./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI --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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- 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-5e519f3 [2022-11-03 03:32:11,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:32:11,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:32:11,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:32:11,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:32:11,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:32:11,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:32:11,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:32:11,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:32:11,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:32:11,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:32:11,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:32:11,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:32:11,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:32:11,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:32:11,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:32:11,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:32:11,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:32:11,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:32:11,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:32:11,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:32:11,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:32:11,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:32:11,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:32:11,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:32:11,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:32:11,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:32:11,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:32:11,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:32:11,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:32:11,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:32:11,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:32:11,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:32:11,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:32:11,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:32:11,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:32:11,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:32:11,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:32:11,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:32:11,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:32:11,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:32:11,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:32:11,677 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:32:11,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:32:11,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:32:11,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:32:11,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:32:11,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:32:11,680 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:32:11,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:32:11,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:32:11,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:32:11,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:32:11,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:32:11,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:32:11,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:32:11,683 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:32:11,683 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:32:11,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:32:11,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:32:11,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:32:11,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:32:11,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:32:11,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:32:11,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:32:11,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:32:11,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:32:11,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:32:11,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:32:11,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:32:11,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:32:11,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:11,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:32:11,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:32:11,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:32:11,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:32:11,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:32:11,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:32:11,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:32:11,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:32:11,690 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_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2022-11-03 03:32:11,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:32:12,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:32:12,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:32:12,024 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:32:12,025 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:32:12,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-03 03:32:12,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/data/c1244c05a/6ee9e59973c1480da3188367dba793df/FLAGcdcb2cf16 [2022-11-03 03:32:12,938 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:32:12,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-03 03:32:12,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/data/c1244c05a/6ee9e59973c1480da3188367dba793df/FLAGcdcb2cf16 [2022-11-03 03:32:13,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/data/c1244c05a/6ee9e59973c1480da3188367dba793df [2022-11-03 03:32:13,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:32:13,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:32:13,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:13,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:32:13,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:32:13,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:13" (1/1) ... [2022-11-03 03:32:13,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a1a4d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:13, skipping insertion in model container [2022-11-03 03:32:13,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:13" (1/1) ... [2022-11-03 03:32:13,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:32:13,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:32:15,163 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-03 03:32:15,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:15,350 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:15,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-03 03:32:15,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:15,810 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:15,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15 WrapperNode [2022-11-03 03:32:15,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:15,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:15,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:15,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:15,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:15,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:15,997 INFO L138 Inliner]: procedures = 282, calls = 1375, calls flagged for inlining = 101, calls inlined = 84, statements flattened = 2567 [2022-11-03 03:32:15,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:15,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:15,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:15,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:16,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:16,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:16,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:16,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:16,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:16,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:16,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:16,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 03:32:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 03:32:16,274 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-03 03:32:16,274 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-03 03:32:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:32:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:32:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:32:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:32:16,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2022-11-03 03:32:16,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2022-11-03 03:32:16,276 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2022-11-03 03:32:16,276 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2022-11-03 03:32:16,276 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2022-11-03 03:32:16,276 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2022-11-03 03:32:16,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:32:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:32:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-03 03:32:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-03 03:32:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2022-11-03 03:32:16,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2022-11-03 03:32:16,277 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-03 03:32:16,278 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-03 03:32:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2022-11-03 03:32:16,278 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2022-11-03 03:32:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:32:16,278 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:32:16,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:32:16,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:32:16,279 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2022-11-03 03:32:16,279 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2022-11-03 03:32:16,279 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 03:32:16,280 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 03:32:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:32:16,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:32:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 03:32:16,280 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 03:32:16,280 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 03:32:16,281 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 03:32:16,281 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2022-11-03 03:32:16,281 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2022-11-03 03:32:16,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2022-11-03 03:32:16,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2022-11-03 03:32:16,281 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2022-11-03 03:32:16,282 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2022-11-03 03:32:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:32:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 03:32:16,283 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 03:32:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2022-11-03 03:32:16,284 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2022-11-03 03:32:16,285 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2022-11-03 03:32:16,285 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2022-11-03 03:32:16,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:32:16,286 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-03 03:32:16,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-03 03:32:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 03:32:16,287 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 03:32:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-03 03:32:16,287 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-03 03:32:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2022-11-03 03:32:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2022-11-03 03:32:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:32:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2022-11-03 03:32:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2022-11-03 03:32:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:32:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-03 03:32:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-03 03:32:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-03 03:32:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-03 03:32:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-03 03:32:16,289 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-03 03:32:16,289 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-03 03:32:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-03 03:32:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 03:32:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 03:32:16,290 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:32:16,290 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:32:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-03 03:32:16,291 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-03 03:32:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2022-11-03 03:32:16,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2022-11-03 03:32:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-03 03:32:16,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-03 03:32:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 03:32:16,293 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 03:32:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-03 03:32:16,293 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-03 03:32:16,294 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 03:32:16,294 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 03:32:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2022-11-03 03:32:16,295 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2022-11-03 03:32:16,295 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-03 03:32:16,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-03 03:32:16,296 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 03:32:16,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-03 03:32:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:32:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-03 03:32:16,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-03 03:32:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:32:16,297 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:32:16,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:32:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 03:32:16,298 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 03:32:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 03:32:16,298 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 03:32:16,298 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2022-11-03 03:32:16,299 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2022-11-03 03:32:16,299 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2022-11-03 03:32:16,299 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2022-11-03 03:32:16,299 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:32:16,300 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:32:16,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:32:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-03 03:32:16,303 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-03 03:32:16,303 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-03 03:32:16,304 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-03 03:32:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:32:16,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:32:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:32:16,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:32:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2022-11-03 03:32:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2022-11-03 03:32:16,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:32:16,311 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-03 03:32:16,311 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-03 03:32:16,311 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:32:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:32:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:32:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:32:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:32:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:32:16,312 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-03 03:32:16,312 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-03 03:32:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-03 03:32:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-03 03:32:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 03:32:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 03:32:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:32:16,313 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:32:16,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-03 03:32:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-03 03:32:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-03 03:32:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-03 03:32:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2022-11-03 03:32:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2022-11-03 03:32:16,314 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 03:32:16,314 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 03:32:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 03:32:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 03:32:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:32:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-03 03:32:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-03 03:32:16,315 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-03 03:32:16,315 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-03 03:32:16,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:16,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:17,010 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:17,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:17,514 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:32:22,322 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:22,965 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:22,965 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:32:22,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:22 BoogieIcfgContainer [2022-11-03 03:32:22,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:22,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:22,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:22,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:22,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:32:13" (1/3) ... [2022-11-03 03:32:22,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ae82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:22, skipping insertion in model container [2022-11-03 03:32:22,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15" (2/3) ... [2022-11-03 03:32:22,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ae82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:22, skipping insertion in model container [2022-11-03 03:32:22,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:22" (3/3) ... [2022-11-03 03:32:22,980 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-03 03:32:23,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:23,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:23,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:23,096 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;@14c0e1f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:23,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 861 states, 488 states have (on average 1.3176229508196722) internal successors, (643), 521 states have internal predecessors, (643), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) [2022-11-03 03:32:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:32:23,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:23,118 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:23,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:23,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -765085009, now seen corresponding path program 1 times [2022-11-03 03:32:23,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:23,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015065975] [2022-11-03 03:32:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 03:32:24,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015065975] [2022-11-03 03:32:24,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015065975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:24,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:24,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964317300] [2022-11-03 03:32:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:24,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:24,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:24,188 INFO L87 Difference]: Start difference. First operand has 861 states, 488 states have (on average 1.3176229508196722) internal successors, (643), 521 states have internal predecessors, (643), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 03:32:26,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:29,337 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 [] [2022-11-03 03:32:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:29,394 INFO L93 Difference]: Finished difference Result 2474 states and 3610 transitions. [2022-11-03 03:32:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 140 [2022-11-03 03:32:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:29,424 INFO L225 Difference]: With dead ends: 2474 [2022-11-03 03:32:29,424 INFO L226 Difference]: Without dead ends: 1635 [2022-11-03 03:32:29,433 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 [2022-11-03 03:32:29,436 INFO L413 NwaCegarLoop]: 1363 mSDtfsCounter, 1116 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:29,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 2458 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:32:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-03 03:32:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1624. [2022-11-03 03:32:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 933 states have (on average 1.3054662379421222) internal successors, (1218), 973 states have internal predecessors, (1218), 553 states have call successors, (553), 138 states have call predecessors, (553), 137 states have return successors, (540), 536 states have call predecessors, (540), 539 states have call successors, (540) [2022-11-03 03:32:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2311 transitions. [2022-11-03 03:32:29,652 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2311 transitions. Word has length 140 [2022-11-03 03:32:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:29,655 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2311 transitions. [2022-11-03 03:32:29,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-03 03:32:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2311 transitions. [2022-11-03 03:32:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 03:32:29,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:29,673 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:29,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:32:29,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1720579061, now seen corresponding path program 1 times [2022-11-03 03:32:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:29,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032313241] [2022-11-03 03:32:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 03:32:30,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:30,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032313241] [2022-11-03 03:32:30,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032313241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:30,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:30,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916164731] [2022-11-03 03:32:30,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:30,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:30,133 INFO L87 Difference]: Start difference. First operand 1624 states and 2311 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:32,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:35,056 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 [] [2022-11-03 03:32:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:35,122 INFO L93 Difference]: Finished difference Result 4038 states and 5682 transitions. [2022-11-03 03:32:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2022-11-03 03:32:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:35,191 INFO L225 Difference]: With dead ends: 4038 [2022-11-03 03:32:35,191 INFO L226 Difference]: Without dead ends: 2450 [2022-11-03 03:32:35,197 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 [2022-11-03 03:32:35,198 INFO L413 NwaCegarLoop]: 1225 mSDtfsCounter, 570 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:35,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 2284 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:32:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2022-11-03 03:32:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2419. [2022-11-03 03:32:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 1390 states have (on average 1.2992805755395684) internal successors, (1806), 1437 states have internal predecessors, (1806), 795 states have call successors, (795), 234 states have call predecessors, (795), 233 states have return successors, (784), 775 states have call predecessors, (784), 781 states have call successors, (784) [2022-11-03 03:32:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3385 transitions. [2022-11-03 03:32:35,332 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3385 transitions. Word has length 145 [2022-11-03 03:32:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:35,332 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 3385 transitions. [2022-11-03 03:32:35,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3385 transitions. [2022-11-03 03:32:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 03:32:35,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:35,336 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:35,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:32:35,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1886891649, now seen corresponding path program 1 times [2022-11-03 03:32:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:35,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138999352] [2022-11-03 03:32:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:32:35,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:35,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138999352] [2022-11-03 03:32:35,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138999352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:35,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:35,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727503009] [2022-11-03 03:32:35,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:35,668 INFO L87 Difference]: Start difference. First operand 2419 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:37,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:40,247 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 [] [2022-11-03 03:32:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:40,455 INFO L93 Difference]: Finished difference Result 2465 states and 3434 transitions. [2022-11-03 03:32:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 155 [2022-11-03 03:32:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:40,469 INFO L225 Difference]: With dead ends: 2465 [2022-11-03 03:32:40,469 INFO L226 Difference]: Without dead ends: 2462 [2022-11-03 03:32:40,470 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 [2022-11-03 03:32:40,471 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 1144 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:40,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1157 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 03:32:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-11-03 03:32:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2462. [2022-11-03 03:32:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 1411 states have (on average 1.2941176470588236) internal successors, (1826), 1458 states have internal predecessors, (1826), 807 states have call successors, (807), 243 states have call predecessors, (807), 243 states have return successors, (798), 788 states have call predecessors, (798), 794 states have call successors, (798) [2022-11-03 03:32:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3431 transitions. [2022-11-03 03:32:40,611 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3431 transitions. Word has length 155 [2022-11-03 03:32:40,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:40,611 INFO L495 AbstractCegarLoop]: Abstraction has 2462 states and 3431 transitions. [2022-11-03 03:32:40,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:40,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3431 transitions. [2022-11-03 03:32:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 03:32:40,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:40,614 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:32:40,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1636394630, now seen corresponding path program 1 times [2022-11-03 03:32:40,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:40,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401614385] [2022-11-03 03:32:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:40,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:32:40,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401614385] [2022-11-03 03:32:40,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401614385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:40,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:40,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816274899] [2022-11-03 03:32:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:40,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:40,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:40,952 INFO L87 Difference]: Start difference. First operand 2462 states and 3431 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:43,920 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 [] [2022-11-03 03:32:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:44,103 INFO L93 Difference]: Finished difference Result 2464 states and 3432 transitions. [2022-11-03 03:32:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:44,104 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2022-11-03 03:32:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:44,120 INFO L225 Difference]: With dead ends: 2464 [2022-11-03 03:32:44,120 INFO L226 Difference]: Without dead ends: 2461 [2022-11-03 03:32:44,123 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 [2022-11-03 03:32:44,124 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 1141 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:44,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1155 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:32:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-11-03 03:32:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2461. [2022-11-03 03:32:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2461 states, 1411 states have (on average 1.293408929836995) internal successors, (1825), 1457 states have internal predecessors, (1825), 806 states have call successors, (806), 243 states have call predecessors, (806), 243 states have return successors, (798), 788 states have call predecessors, (798), 794 states have call successors, (798) [2022-11-03 03:32:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3429 transitions. [2022-11-03 03:32:44,395 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 3429 transitions. Word has length 156 [2022-11-03 03:32:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:44,397 INFO L495 AbstractCegarLoop]: Abstraction has 2461 states and 3429 transitions. [2022-11-03 03:32:44,397 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 3429 transitions. [2022-11-03 03:32:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 03:32:44,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:44,403 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:44,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:32:44,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 810885284, now seen corresponding path program 1 times [2022-11-03 03:32:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850736266] [2022-11-03 03:32:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:44,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:32:44,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850736266] [2022-11-03 03:32:44,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850736266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:44,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:44,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282729452] [2022-11-03 03:32:44,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:44,768 INFO L87 Difference]: Start difference. First operand 2461 states and 3429 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:45,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:48,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:48,557 INFO L93 Difference]: Finished difference Result 2463 states and 3430 transitions. [2022-11-03 03:32:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2022-11-03 03:32:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:48,571 INFO L225 Difference]: With dead ends: 2463 [2022-11-03 03:32:48,571 INFO L226 Difference]: Without dead ends: 2460 [2022-11-03 03:32:48,573 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 [2022-11-03 03:32:48,574 INFO L413 NwaCegarLoop]: 1098 mSDtfsCounter, 1138 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:48,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 1153 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 03:32:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-11-03 03:32:48,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2460. [2022-11-03 03:32:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 1411 states have (on average 1.2927002126151665) internal successors, (1824), 1456 states have internal predecessors, (1824), 805 states have call successors, (805), 243 states have call predecessors, (805), 243 states have return successors, (798), 788 states have call predecessors, (798), 794 states have call successors, (798) [2022-11-03 03:32:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3427 transitions. [2022-11-03 03:32:48,751 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3427 transitions. Word has length 157 [2022-11-03 03:32:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:48,756 INFO L495 AbstractCegarLoop]: Abstraction has 2460 states and 3427 transitions. [2022-11-03 03:32:48,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3427 transitions. [2022-11-03 03:32:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 03:32:48,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:48,760 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:32:48,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash 452220969, now seen corresponding path program 1 times [2022-11-03 03:32:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099113158] [2022-11-03 03:32:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:48,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 03:32:49,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099113158] [2022-11-03 03:32:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099113158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:49,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:49,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909307749] [2022-11-03 03:32:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:49,092 INFO L87 Difference]: Start difference. First operand 2460 states and 3427 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:32:51,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:54,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:54,134 INFO L93 Difference]: Finished difference Result 6169 states and 8576 transitions. [2022-11-03 03:32:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 161 [2022-11-03 03:32:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:54,156 INFO L225 Difference]: With dead ends: 6169 [2022-11-03 03:32:54,156 INFO L226 Difference]: Without dead ends: 3745 [2022-11-03 03:32:54,165 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 [2022-11-03 03:32:54,166 INFO L413 NwaCegarLoop]: 1552 mSDtfsCounter, 772 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:54,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 2622 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 03:32:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-11-03 03:32:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3724. [2022-11-03 03:32:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 2175 states have (on average 1.3002298850574712) internal successors, (2828), 2248 states have internal predecessors, (2828), 1177 states have call successors, (1177), 371 states have call predecessors, (1177), 371 states have return successors, (1170), 1156 states have call predecessors, (1170), 1166 states have call successors, (1170) [2022-11-03 03:32:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 5175 transitions. [2022-11-03 03:32:54,445 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 5175 transitions. Word has length 161 [2022-11-03 03:32:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:54,445 INFO L495 AbstractCegarLoop]: Abstraction has 3724 states and 5175 transitions. [2022-11-03 03:32:54,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 03:32:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 5175 transitions. [2022-11-03 03:32:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 03:32:54,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:54,448 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:54,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:32:54,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash -632843843, now seen corresponding path program 1 times [2022-11-03 03:32:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135523963] [2022-11-03 03:32:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:54,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:32:54,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:54,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135523963] [2022-11-03 03:32:54,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135523963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:54,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:54,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927026262] [2022-11-03 03:32:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:54,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:54,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:54,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:54,780 INFO L87 Difference]: Start difference. First operand 3724 states and 5175 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:32:56,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:32:59,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:00,007 INFO L93 Difference]: Finished difference Result 10472 states and 14478 transitions. [2022-11-03 03:33:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:00,008 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 158 [2022-11-03 03:33:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:00,100 INFO L225 Difference]: With dead ends: 10472 [2022-11-03 03:33:00,100 INFO L226 Difference]: Without dead ends: 6784 [2022-11-03 03:33:00,120 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 [2022-11-03 03:33:00,123 INFO L413 NwaCegarLoop]: 1354 mSDtfsCounter, 954 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 2345 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:00,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 2345 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 03:33:00,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6784 states. [2022-11-03 03:33:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6784 to 6754. [2022-11-03 03:33:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6754 states, 3972 states have (on average 1.3001007049345419) internal successors, (5164), 4098 states have internal predecessors, (5164), 2074 states have call successors, (2074), 716 states have call predecessors, (2074), 707 states have return successors, (2070), 2023 states have call predecessors, (2070), 2062 states have call successors, (2070) [2022-11-03 03:33:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 9308 transitions. [2022-11-03 03:33:00,691 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 9308 transitions. Word has length 158 [2022-11-03 03:33:00,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:00,691 INFO L495 AbstractCegarLoop]: Abstraction has 6754 states and 9308 transitions. [2022-11-03 03:33:00,693 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, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:33:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 9308 transitions. [2022-11-03 03:33:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 03:33:00,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:00,697 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:33:00,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1856198343, now seen corresponding path program 1 times [2022-11-03 03:33:00,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:00,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243208042] [2022-11-03 03:33:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:33:01,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243208042] [2022-11-03 03:33:01,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243208042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:01,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:01,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860571635] [2022-11-03 03:33:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:01,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:01,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:01,083 INFO L87 Difference]: Start difference. First operand 6754 states and 9308 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:33:03,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:05,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:06,097 INFO L93 Difference]: Finished difference Result 7362 states and 9806 transitions. [2022-11-03 03:33:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:06,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 159 [2022-11-03 03:33:06,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:06,166 INFO L225 Difference]: With dead ends: 7362 [2022-11-03 03:33:06,166 INFO L226 Difference]: Without dead ends: 7358 [2022-11-03 03:33:06,170 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 [2022-11-03 03:33:06,171 INFO L413 NwaCegarLoop]: 1096 mSDtfsCounter, 950 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:06,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1347 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 03:33:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7358 states. [2022-11-03 03:33:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7358 to 7352. [2022-11-03 03:33:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 4298 states have (on average 1.2794322940902745) internal successors, (5499), 4418 states have internal predecessors, (5499), 2144 states have call successors, (2144), 922 states have call predecessors, (2144), 909 states have return successors, (2142), 2095 states have call predecessors, (2142), 2134 states have call successors, (2142) [2022-11-03 03:33:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 9785 transitions. [2022-11-03 03:33:06,784 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 9785 transitions. Word has length 159 [2022-11-03 03:33:06,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:06,785 INFO L495 AbstractCegarLoop]: Abstraction has 7352 states and 9785 transitions. [2022-11-03 03:33:06,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:33:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 9785 transitions. [2022-11-03 03:33:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 03:33:06,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:06,789 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:06,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:33:06,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1707099648, now seen corresponding path program 1 times [2022-11-03 03:33:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989262834] [2022-11-03 03:33:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:33:07,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989262834] [2022-11-03 03:33:07,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989262834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:07,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:07,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:07,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976696462] [2022-11-03 03:33:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:07,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:07,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:07,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:07,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:07,082 INFO L87 Difference]: Start difference. First operand 7352 states and 9785 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:33:08,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:11,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:11,686 INFO L93 Difference]: Finished difference Result 20172 states and 26941 transitions. [2022-11-03 03:33:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 160 [2022-11-03 03:33:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:11,740 INFO L225 Difference]: With dead ends: 20172 [2022-11-03 03:33:11,741 INFO L226 Difference]: Without dead ends: 12849 [2022-11-03 03:33:11,768 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 [2022-11-03 03:33:11,769 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 994 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:11,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 2419 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 03:33:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12849 states. [2022-11-03 03:33:12,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12849 to 12792. [2022-11-03 03:33:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 7577 states have (on average 1.2924640358981128) internal successors, (9793), 7789 states have internal predecessors, (9793), 3633 states have call successors, (3633), 1625 states have call predecessors, (3633), 1581 states have return successors, (3670), 3517 states have call predecessors, (3670), 3622 states have call successors, (3670) [2022-11-03 03:33:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 17096 transitions. [2022-11-03 03:33:12,787 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 17096 transitions. Word has length 160 [2022-11-03 03:33:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:12,788 INFO L495 AbstractCegarLoop]: Abstraction has 12792 states and 17096 transitions. [2022-11-03 03:33:12,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:33:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 17096 transitions. [2022-11-03 03:33:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-03 03:33:12,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:12,796 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:12,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:33:12,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2115643624, now seen corresponding path program 1 times [2022-11-03 03:33:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:12,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126221524] [2022-11-03 03:33:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-03 03:33:13,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126221524] [2022-11-03 03:33:13,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126221524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:13,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:13,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708266076] [2022-11-03 03:33:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:13,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:13,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:13,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:13,231 INFO L87 Difference]: Start difference. First operand 12792 states and 17096 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:33:15,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:18,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:18,371 INFO L93 Difference]: Finished difference Result 19425 states and 25936 transitions. [2022-11-03 03:33:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 199 [2022-11-03 03:33:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:18,399 INFO L225 Difference]: With dead ends: 19425 [2022-11-03 03:33:18,400 INFO L226 Difference]: Without dead ends: 6667 [2022-11-03 03:33:18,439 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 [2022-11-03 03:33:18,440 INFO L413 NwaCegarLoop]: 1092 mSDtfsCounter, 12 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:18,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2170 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 03:33:18,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-11-03 03:33:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6591. [2022-11-03 03:33:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6591 states, 3906 states have (on average 1.2939068100358424) internal successors, (5054), 4018 states have internal predecessors, (5054), 1868 states have call successors, (1868), 839 states have call predecessors, (1868), 816 states have return successors, (1881), 1804 states have call predecessors, (1881), 1857 states have call successors, (1881) [2022-11-03 03:33:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6591 states to 6591 states and 8803 transitions. [2022-11-03 03:33:18,919 INFO L78 Accepts]: Start accepts. Automaton has 6591 states and 8803 transitions. Word has length 199 [2022-11-03 03:33:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:18,919 INFO L495 AbstractCegarLoop]: Abstraction has 6591 states and 8803 transitions. [2022-11-03 03:33:18,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:33:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6591 states and 8803 transitions. [2022-11-03 03:33:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-03 03:33:18,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:18,926 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2022-11-03 03:33:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:33:18,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1566864886, now seen corresponding path program 1 times [2022-11-03 03:33:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3837790] [2022-11-03 03:33:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-03 03:33:19,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3837790] [2022-11-03 03:33:19,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3837790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:19,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:19,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:19,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456767905] [2022-11-03 03:33:19,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:19,348 INFO L87 Difference]: Start difference. First operand 6591 states and 8803 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 03:33:21,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:23,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:26,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:26,565 INFO L93 Difference]: Finished difference Result 16346 states and 21745 transitions. [2022-11-03 03:33:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 205 [2022-11-03 03:33:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:26,604 INFO L225 Difference]: With dead ends: 16346 [2022-11-03 03:33:26,605 INFO L226 Difference]: Without dead ends: 9880 [2022-11-03 03:33:26,625 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 [2022-11-03 03:33:26,626 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 868 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:26,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 2481 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 305 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:33:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2022-11-03 03:33:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9772. [2022-11-03 03:33:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 5834 states have (on average 1.286252999657182) internal successors, (7504), 5998 states have internal predecessors, (7504), 2690 states have call successors, (2690), 1282 states have call predecessors, (2690), 1247 states have return successors, (2707), 2603 states have call predecessors, (2707), 2679 states have call successors, (2707) [2022-11-03 03:33:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 12901 transitions. [2022-11-03 03:33:27,452 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 12901 transitions. Word has length 205 [2022-11-03 03:33:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:27,453 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 12901 transitions. [2022-11-03 03:33:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 03:33:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 12901 transitions. [2022-11-03 03:33:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-03 03:33:27,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:27,458 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2022-11-03 03:33:27,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:33:27,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -103223306, now seen corresponding path program 1 times [2022-11-03 03:33:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924591105] [2022-11-03 03:33:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 03:33:27,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924591105] [2022-11-03 03:33:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924591105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:27,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:27,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875233947] [2022-11-03 03:33:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:27,943 INFO L87 Difference]: Start difference. First operand 9772 states and 12901 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:33:29,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:32,854 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 [] [2022-11-03 03:33:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:32,894 INFO L93 Difference]: Finished difference Result 9780 states and 12907 transitions. [2022-11-03 03:33:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2022-11-03 03:33:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:32,935 INFO L225 Difference]: With dead ends: 9780 [2022-11-03 03:33:32,936 INFO L226 Difference]: Without dead ends: 9777 [2022-11-03 03:33:32,942 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 [2022-11-03 03:33:32,943 INFO L413 NwaCegarLoop]: 1099 mSDtfsCounter, 248 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:32,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2007 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 03:33:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9777 states. [2022-11-03 03:33:33,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9777 to 9771. [2022-11-03 03:33:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9771 states, 5834 states have (on average 1.2840246828933837) internal successors, (7491), 5997 states have internal predecessors, (7491), 2689 states have call successors, (2689), 1282 states have call predecessors, (2689), 1247 states have return successors, (2707), 2603 states have call predecessors, (2707), 2679 states have call successors, (2707) [2022-11-03 03:33:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 12887 transitions. [2022-11-03 03:33:33,618 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 12887 transitions. Word has length 212 [2022-11-03 03:33:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:33,619 INFO L495 AbstractCegarLoop]: Abstraction has 9771 states and 12887 transitions. [2022-11-03 03:33:33,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:33:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 12887 transitions. [2022-11-03 03:33:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-03 03:33:33,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:33,625 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:33,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:33:33,626 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:33,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1777363037, now seen corresponding path program 1 times [2022-11-03 03:33:33,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:33,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387095359] [2022-11-03 03:33:33,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-03 03:33:34,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:34,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387095359] [2022-11-03 03:33:34,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387095359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:34,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:33:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435237642] [2022-11-03 03:33:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:34,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:33:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:33:34,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:33:34,018 INFO L87 Difference]: Start difference. First operand 9771 states and 12887 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 03:33:36,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:39,647 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 [] [2022-11-03 03:33:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:39,690 INFO L93 Difference]: Finished difference Result 22801 states and 30073 transitions. [2022-11-03 03:33:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:33:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 223 [2022-11-03 03:33:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:39,766 INFO L225 Difference]: With dead ends: 22801 [2022-11-03 03:33:39,767 INFO L226 Difference]: Without dead ends: 13163 [2022-11-03 03:33:39,801 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 [2022-11-03 03:33:39,802 INFO L413 NwaCegarLoop]: 1438 mSDtfsCounter, 898 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:39,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 2408 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 275 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:33:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13163 states. [2022-11-03 03:33:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13163 to 13137. [2022-11-03 03:33:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13137 states, 7972 states have (on average 1.288509784244857) internal successors, (10272), 8201 states have internal predecessors, (10272), 3477 states have call successors, (3477), 1726 states have call predecessors, (3477), 1687 states have return successors, (3503), 3375 states have call predecessors, (3503), 3467 states have call successors, (3503) [2022-11-03 03:33:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13137 states to 13137 states and 17252 transitions. [2022-11-03 03:33:40,707 INFO L78 Accepts]: Start accepts. Automaton has 13137 states and 17252 transitions. Word has length 223 [2022-11-03 03:33:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:40,707 INFO L495 AbstractCegarLoop]: Abstraction has 13137 states and 17252 transitions. [2022-11-03 03:33:40,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 03:33:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13137 states and 17252 transitions. [2022-11-03 03:33:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-03 03:33:40,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:40,713 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:40,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:33:40,714 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash -938473692, now seen corresponding path program 1 times [2022-11-03 03:33:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:40,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313112409] [2022-11-03 03:33:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 03:33:41,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313112409] [2022-11-03 03:33:41,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313112409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:41,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:41,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:33:41,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88357549] [2022-11-03 03:33:41,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:41,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:33:41,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:33:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:41,828 INFO L87 Difference]: Start difference. First operand 13137 states and 17252 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 03:33:43,194 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 [] [2022-11-03 03:33:45,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:49,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:33:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:49,559 INFO L93 Difference]: Finished difference Result 31726 states and 41719 transitions. [2022-11-03 03:33:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:33:49,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 232 [2022-11-03 03:33:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:49,633 INFO L225 Difference]: With dead ends: 31726 [2022-11-03 03:33:49,633 INFO L226 Difference]: Without dead ends: 18722 [2022-11-03 03:33:49,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:33:49,675 INFO L413 NwaCegarLoop]: 1778 mSDtfsCounter, 1010 mSDsluCounter, 2115 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:49,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 3673 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:33:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18722 states. [2022-11-03 03:33:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18722 to 18572. [2022-11-03 03:33:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18572 states, 11317 states have (on average 1.2930988777944685) internal successors, (14634), 11679 states have internal predecessors, (14634), 4853 states have call successors, (4853), 2435 states have call predecessors, (4853), 2401 states have return successors, (4893), 4689 states have call predecessors, (4893), 4827 states have call successors, (4893) [2022-11-03 03:33:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18572 states to 18572 states and 24380 transitions. [2022-11-03 03:33:51,572 INFO L78 Accepts]: Start accepts. Automaton has 18572 states and 24380 transitions. Word has length 232 [2022-11-03 03:33:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:51,573 INFO L495 AbstractCegarLoop]: Abstraction has 18572 states and 24380 transitions. [2022-11-03 03:33:51,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 03:33:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 18572 states and 24380 transitions. [2022-11-03 03:33:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-03 03:33:51,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:51,581 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:51,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:33:51,581 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -633882516, now seen corresponding path program 1 times [2022-11-03 03:33:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:51,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308014333] [2022-11-03 03:33:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:51,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-03 03:33:52,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308014333] [2022-11-03 03:33:52,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308014333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:52,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588814750] [2022-11-03 03:33:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:52,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:52,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:33:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 3057 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:33:54,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-03 03:33:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:55,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588814750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:55,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:33:55,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:33:55,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715223876] [2022-11-03 03:33:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:55,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:55,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:55,233 INFO L87 Difference]: Start difference. First operand 18572 states and 24380 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-03 03:34:03,273 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 [] [2022-11-03 03:34:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:03,329 INFO L93 Difference]: Finished difference Result 40396 states and 53211 transitions. [2022-11-03 03:34:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 233 [2022-11-03 03:34:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:03,410 INFO L225 Difference]: With dead ends: 40396 [2022-11-03 03:34:03,411 INFO L226 Difference]: Without dead ends: 21957 [2022-11-03 03:34:03,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:34:03,459 INFO L413 NwaCegarLoop]: 1789 mSDtfsCounter, 1823 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1880 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:03,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1880 Valid, 3877 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1375 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:34:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21957 states. [2022-11-03 03:34:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21957 to 21026. [2022-11-03 03:34:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 12913 states have (on average 1.297219855959111) internal successors, (16751), 13333 states have internal predecessors, (16751), 5405 states have call successors, (5405), 2741 states have call predecessors, (5405), 2707 states have return successors, (5461), 5225 states have call predecessors, (5461), 5379 states have call successors, (5461) [2022-11-03 03:34:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 27617 transitions. [2022-11-03 03:34:05,577 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 27617 transitions. Word has length 233 [2022-11-03 03:34:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 27617 transitions. [2022-11-03 03:34:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-03 03:34:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 27617 transitions. [2022-11-03 03:34:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-03 03:34:05,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:05,614 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:05,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 03:34:05,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:34:05,830 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:05,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1365259453, now seen corresponding path program 1 times [2022-11-03 03:34:05,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:05,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91394785] [2022-11-03 03:34:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:05,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-03 03:34:07,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:07,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91394785] [2022-11-03 03:34:07,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91394785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:07,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:07,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:34:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640079184] [2022-11-03 03:34:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:07,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:34:07,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:34:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:07,954 INFO L87 Difference]: Start difference. First operand 21026 states and 27617 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 03:34:09,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:15,176 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 [] [2022-11-03 03:34:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:15,234 INFO L93 Difference]: Finished difference Result 42339 states and 55738 transitions. [2022-11-03 03:34:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 244 [2022-11-03 03:34:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:15,333 INFO L225 Difference]: With dead ends: 42339 [2022-11-03 03:34:15,333 INFO L226 Difference]: Without dead ends: 21446 [2022-11-03 03:34:15,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:15,386 INFO L413 NwaCegarLoop]: 1085 mSDtfsCounter, 3 mSDsluCounter, 5992 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6493 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:15,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6493 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 735 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 03:34:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21446 states. [2022-11-03 03:34:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21446 to 21302. [2022-11-03 03:34:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21302 states, 13101 states have (on average 1.2929547362796734) internal successors, (16939), 13521 states have internal predecessors, (16939), 5405 states have call successors, (5405), 2741 states have call predecessors, (5405), 2795 states have return successors, (5633), 5313 states have call predecessors, (5633), 5379 states have call successors, (5633) [2022-11-03 03:34:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21302 states to 21302 states and 27977 transitions. [2022-11-03 03:34:17,275 INFO L78 Accepts]: Start accepts. Automaton has 21302 states and 27977 transitions. Word has length 244 [2022-11-03 03:34:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:17,276 INFO L495 AbstractCegarLoop]: Abstraction has 21302 states and 27977 transitions. [2022-11-03 03:34:17,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 03:34:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 21302 states and 27977 transitions. [2022-11-03 03:34:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 03:34:17,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:17,287 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:34:17,288 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -365454954, now seen corresponding path program 1 times [2022-11-03 03:34:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:17,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816106208] [2022-11-03 03:34:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2022-11-03 03:34:18,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816106208] [2022-11-03 03:34:18,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816106208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231834178] [2022-11-03 03:34:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:18,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:18,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:18,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:34:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:34:20,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-03 03:34:20,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231834178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:34:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935920553] [2022-11-03 03:34:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:34:20,309 INFO L87 Difference]: Start difference. First operand 21302 states and 27977 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 03:34:22,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:28,273 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 [] [2022-11-03 03:34:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:28,336 INFO L93 Difference]: Finished difference Result 49476 states and 65000 transitions. [2022-11-03 03:34:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 248 [2022-11-03 03:34:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:28,444 INFO L225 Difference]: With dead ends: 49476 [2022-11-03 03:34:28,444 INFO L226 Difference]: Without dead ends: 28299 [2022-11-03 03:34:28,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:28,492 INFO L413 NwaCegarLoop]: 1798 mSDtfsCounter, 974 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 4077 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:28,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 4077 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1026 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 03:34:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28299 states. [2022-11-03 03:34:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28299 to 27521. [2022-11-03 03:34:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27521 states, 17038 states have (on average 1.2991548303791525) internal successors, (22135), 17599 states have internal predecessors, (22135), 6906 states have call successors, (6906), 3470 states have call predecessors, (6906), 3576 states have return successors, (7232), 6813 states have call predecessors, (7232), 6880 states have call successors, (7232) [2022-11-03 03:34:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27521 states to 27521 states and 36273 transitions. [2022-11-03 03:34:30,485 INFO L78 Accepts]: Start accepts. Automaton has 27521 states and 36273 transitions. Word has length 248 [2022-11-03 03:34:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:30,486 INFO L495 AbstractCegarLoop]: Abstraction has 27521 states and 36273 transitions. [2022-11-03 03:34:30,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 03:34:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 27521 states and 36273 transitions. [2022-11-03 03:34:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-03 03:34:30,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:30,499 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:30,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:30,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:34:30,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 12476780, now seen corresponding path program 1 times [2022-11-03 03:34:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:30,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635814229] [2022-11-03 03:34:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-03 03:34:32,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635814229] [2022-11-03 03:34:32,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635814229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860979362] [2022-11-03 03:34:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:32,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:32,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:34:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:34:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 166 proven. 1 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2022-11-03 03:34:34,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2022-11-03 03:34:34,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860979362] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:34,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:34:34,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 13 [2022-11-03 03:34:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446746170] [2022-11-03 03:34:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:34,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:34:34,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:34:34,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:34:34,735 INFO L87 Difference]: Start difference. First operand 27521 states and 36273 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-03 03:34:36,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:37,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:45,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:34:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:45,802 INFO L93 Difference]: Finished difference Result 59950 states and 80748 transitions. [2022-11-03 03:34:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:34:45,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 246 [2022-11-03 03:34:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:45,907 INFO L225 Difference]: With dead ends: 59950 [2022-11-03 03:34:45,907 INFO L226 Difference]: Without dead ends: 32562 [2022-11-03 03:34:45,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:34:45,965 INFO L413 NwaCegarLoop]: 1450 mSDtfsCounter, 1885 mSDsluCounter, 2161 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 558 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:45,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 3300 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 1443 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 03:34:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32562 states. [2022-11-03 03:34:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32562 to 27211. [2022-11-03 03:34:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27211 states, 17052 states have (on average 1.307940417546329) internal successors, (22303), 17560 states have internal predecessors, (22303), 6658 states have call successors, (6658), 3427 states have call predecessors, (6658), 3500 states have return successors, (6896), 6532 states have call predecessors, (6896), 6628 states have call successors, (6896) [2022-11-03 03:34:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27211 states to 27211 states and 35857 transitions. [2022-11-03 03:34:48,288 INFO L78 Accepts]: Start accepts. Automaton has 27211 states and 35857 transitions. Word has length 246 [2022-11-03 03:34:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:48,288 INFO L495 AbstractCegarLoop]: Abstraction has 27211 states and 35857 transitions. [2022-11-03 03:34:48,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-03 03:34:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27211 states and 35857 transitions. [2022-11-03 03:34:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-03 03:34:48,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:48,301 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:48,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:48,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:34:48,518 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash -52269685, now seen corresponding path program 1 times [2022-11-03 03:34:48,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:48,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823610409] [2022-11-03 03:34:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-03 03:34:50,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823610409] [2022-11-03 03:34:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823610409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372707633] [2022-11-03 03:34:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:50,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:50,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:50,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:34:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 3305 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:34:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-03 03:34:52,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:52,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372707633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:52,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:52,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-03 03:34:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935376491] [2022-11-03 03:34:52,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:34:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:34:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:34:52,570 INFO L87 Difference]: Start difference. First operand 27211 states and 35857 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-11-03 03:34:54,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:02,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:03,361 INFO L93 Difference]: Finished difference Result 57872 states and 76369 transitions. [2022-11-03 03:35:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:35:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 252 [2022-11-03 03:35:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:03,447 INFO L225 Difference]: With dead ends: 57872 [2022-11-03 03:35:03,447 INFO L226 Difference]: Without dead ends: 30796 [2022-11-03 03:35:03,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:35:03,501 INFO L413 NwaCegarLoop]: 1860 mSDtfsCounter, 1917 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 105 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 5431 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:03,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 5431 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2820 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 03:35:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30796 states. [2022-11-03 03:35:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30796 to 27222. [2022-11-03 03:35:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27222 states, 17063 states have (on average 1.3077418976733282) internal successors, (22314), 17560 states have internal predecessors, (22314), 6658 states have call successors, (6658), 3427 states have call predecessors, (6658), 3500 states have return successors, (6896), 6543 states have call predecessors, (6896), 6628 states have call successors, (6896) [2022-11-03 03:35:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27222 states to 27222 states and 35868 transitions. [2022-11-03 03:35:05,517 INFO L78 Accepts]: Start accepts. Automaton has 27222 states and 35868 transitions. Word has length 252 [2022-11-03 03:35:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:05,517 INFO L495 AbstractCegarLoop]: Abstraction has 27222 states and 35868 transitions. [2022-11-03 03:35:05,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-11-03 03:35:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27222 states and 35868 transitions. [2022-11-03 03:35:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-11-03 03:35:05,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:05,544 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:05,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:05,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:05,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:05,771 INFO L85 PathProgramCache]: Analyzing trace with hash 173812111, now seen corresponding path program 1 times [2022-11-03 03:35:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:05,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859127345] [2022-11-03 03:35:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2022-11-03 03:35:07,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859127345] [2022-11-03 03:35:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859127345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:07,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:35:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:35:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726603472] [2022-11-03 03:35:07,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:07,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:35:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:35:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:35:07,193 INFO L87 Difference]: Start difference. First operand 27222 states and 35868 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:35:14,548 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 [] [2022-11-03 03:35:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:14,700 INFO L93 Difference]: Finished difference Result 49123 states and 64301 transitions. [2022-11-03 03:35:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:35:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 282 [2022-11-03 03:35:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:14,778 INFO L225 Difference]: With dead ends: 49123 [2022-11-03 03:35:14,778 INFO L226 Difference]: Without dead ends: 24618 [2022-11-03 03:35:14,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:35:14,828 INFO L413 NwaCegarLoop]: 1949 mSDtfsCounter, 1424 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 403 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:14,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 3032 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 504 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 03:35:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24618 states. [2022-11-03 03:35:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24618 to 24405. [2022-11-03 03:35:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 15275 states have (on average 1.3014075286415712) internal successors, (19879), 15704 states have internal predecessors, (19879), 5820 states have call successors, (5820), 3233 states have call predecessors, (5820), 3309 states have return successors, (6048), 5742 states have call predecessors, (6048), 5801 states have call successors, (6048) [2022-11-03 03:35:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 31747 transitions. [2022-11-03 03:35:16,302 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 31747 transitions. Word has length 282 [2022-11-03 03:35:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:16,303 INFO L495 AbstractCegarLoop]: Abstraction has 24405 states and 31747 transitions. [2022-11-03 03:35:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:35:16,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 31747 transitions. [2022-11-03 03:35:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 03:35:16,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:16,326 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:16,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 03:35:16,326 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -542239805, now seen corresponding path program 1 times [2022-11-03 03:35:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:16,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803754739] [2022-11-03 03:35:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2022-11-03 03:35:17,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:17,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803754739] [2022-11-03 03:35:17,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803754739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330707517] [2022-11-03 03:35:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:17,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:17,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:17,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:17,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:35:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:19,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 3250 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:35:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-11-03 03:35:19,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:35:19,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330707517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:35:19,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:35:19,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-03 03:35:19,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496552815] [2022-11-03 03:35:19,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:19,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:35:19,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:35:19,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:35:19,853 INFO L87 Difference]: Start difference. First operand 24405 states and 31747 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2022-11-03 03:35:22,286 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 [] [2022-11-03 03:35:28,432 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 [] [2022-11-03 03:35:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:28,916 INFO L93 Difference]: Finished difference Result 49397 states and 65256 transitions. [2022-11-03 03:35:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:35:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 284 [2022-11-03 03:35:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:28,997 INFO L225 Difference]: With dead ends: 49397 [2022-11-03 03:35:28,997 INFO L226 Difference]: Without dead ends: 27668 [2022-11-03 03:35:29,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:35:29,039 INFO L413 NwaCegarLoop]: 1565 mSDtfsCounter, 1128 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 3124 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:29,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 3124 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1074 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 03:35:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2022-11-03 03:35:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 24435. [2022-11-03 03:35:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24435 states, 15316 states have (on average 1.3014494646121704) internal successors, (19933), 15765 states have internal predecessors, (19933), 5844 states have call successors, (5844), 3190 states have call predecessors, (5844), 3274 states have return successors, (6072), 5762 states have call predecessors, (6072), 5825 states have call successors, (6072) [2022-11-03 03:35:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24435 states to 24435 states and 31849 transitions. [2022-11-03 03:35:30,667 INFO L78 Accepts]: Start accepts. Automaton has 24435 states and 31849 transitions. Word has length 284 [2022-11-03 03:35:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:30,668 INFO L495 AbstractCegarLoop]: Abstraction has 24435 states and 31849 transitions. [2022-11-03 03:35:30,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2022-11-03 03:35:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24435 states and 31849 transitions. [2022-11-03 03:35:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-03 03:35:30,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:30,685 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:30,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:30,890 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1837158580, now seen corresponding path program 1 times [2022-11-03 03:35:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:30,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391165588] [2022-11-03 03:35:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-03 03:35:32,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:32,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391165588] [2022-11-03 03:35:32,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391165588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:32,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255303415] [2022-11-03 03:35:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:32,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:32,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:32,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:32,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:35:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 3455 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:35:33,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-11-03 03:35:33,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-11-03 03:35:34,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255303415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:34,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:35:34,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 11 [2022-11-03 03:35:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245661390] [2022-11-03 03:35:34,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:35:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:35:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:35:34,502 INFO L87 Difference]: Start difference. First operand 24435 states and 31849 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-03 03:35:36,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:35:45,228 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 [] [2022-11-03 03:35:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:45,430 INFO L93 Difference]: Finished difference Result 64160 states and 85699 transitions. [2022-11-03 03:35:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:35:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 291 [2022-11-03 03:35:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:45,545 INFO L225 Difference]: With dead ends: 64160 [2022-11-03 03:35:45,545 INFO L226 Difference]: Without dead ends: 39860 [2022-11-03 03:35:45,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:35:45,748 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 2580 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 999 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2763 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2763 Valid, 3460 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 1566 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-03 03:35:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39860 states. [2022-11-03 03:35:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39860 to 32463. [2022-11-03 03:35:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32463 states, 20476 states have (on average 1.3060168001562806) internal successors, (26742), 21082 states have internal predecessors, (26742), 7588 states have call successors, (7588), 4293 states have call predecessors, (7588), 4398 states have return successors, (7876), 7478 states have call predecessors, (7876), 7569 states have call successors, (7876) [2022-11-03 03:35:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32463 states to 32463 states and 42206 transitions. [2022-11-03 03:35:48,121 INFO L78 Accepts]: Start accepts. Automaton has 32463 states and 42206 transitions. Word has length 291 [2022-11-03 03:35:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:48,121 INFO L495 AbstractCegarLoop]: Abstraction has 32463 states and 42206 transitions. [2022-11-03 03:35:48,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-03 03:35:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32463 states and 42206 transitions. [2022-11-03 03:35:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-03 03:35:48,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:48,148 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:48,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 03:35:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 03:35:48,349 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash -57237437, now seen corresponding path program 1 times [2022-11-03 03:35:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:48,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69233104] [2022-11-03 03:35:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2022-11-03 03:35:49,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69233104] [2022-11-03 03:35:49,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69233104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275293553] [2022-11-03 03:35:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:49,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:49,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:49,830 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:49,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:35:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 3703 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:35:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-03 03:35:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2022-11-03 03:35:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275293553] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:52,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:35:52,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 8] total 20 [2022-11-03 03:35:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920316191] [2022-11-03 03:35:52,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:35:52,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:35:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:35:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:35:52,625 INFO L87 Difference]: Start difference. First operand 32463 states and 42206 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-03 03:35:54,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:36:06,008 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 [] [2022-11-03 03:36:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:06,343 INFO L93 Difference]: Finished difference Result 76787 states and 101956 transitions. [2022-11-03 03:36:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:36:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) Word has length 310 [2022-11-03 03:36:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:06,472 INFO L225 Difference]: With dead ends: 76787 [2022-11-03 03:36:06,472 INFO L226 Difference]: Without dead ends: 44459 [2022-11-03 03:36:06,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:36:06,542 INFO L413 NwaCegarLoop]: 1546 mSDtfsCounter, 2233 mSDsluCounter, 5134 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 731 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 5999 SdHoareTripleChecker+Invalid, 5035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:06,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 5999 Invalid, 5035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [731 Valid, 4302 Invalid, 2 Unknown, 0 Unchecked, 10.4s Time] [2022-11-03 03:36:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44459 states. [2022-11-03 03:36:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44459 to 37759. [2022-11-03 03:36:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37759 states, 23953 states have (on average 1.311401494593579) internal successors, (31412), 24646 states have internal predecessors, (31412), 8710 states have call successors, (8710), 4959 states have call predecessors, (8710), 5095 states have return successors, (9061), 8620 states have call predecessors, (9061), 8691 states have call successors, (9061) [2022-11-03 03:36:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37759 states to 37759 states and 49183 transitions. [2022-11-03 03:36:09,430 INFO L78 Accepts]: Start accepts. Automaton has 37759 states and 49183 transitions. Word has length 310 [2022-11-03 03:36:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:09,431 INFO L495 AbstractCegarLoop]: Abstraction has 37759 states and 49183 transitions. [2022-11-03 03:36:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-03 03:36:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 37759 states and 49183 transitions. [2022-11-03 03:36:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-03 03:36:09,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:09,476 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 5, 5, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:09,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:09,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d1858b5-6631-4e80-a03a-e324ab394d7a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 03:36:09,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:09,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2012012544, now seen corresponding path program 1 times [2022-11-03 03:36:09,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:36:09,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959348996] [2022-11-03 03:36:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:09,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:36:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2022-11-03 03:36:10,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:36:10,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959348996] [2022-11-03 03:36:10,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959348996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:36:10,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:36:10,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:36:10,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725527157] [2022-11-03 03:36:10,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:36:10,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:36:10,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:36:10,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:36:10,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:36:10,935 INFO L87 Difference]: Start difference. First operand 37759 states and 49183 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-03 03:36:12,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:36:20,170 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 [] [2022-11-03 03:36:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:20,397 INFO L93 Difference]: Finished difference Result 80823 states and 105911 transitions. [2022-11-03 03:36:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:36:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 331 [2022-11-03 03:36:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:20,531 INFO L225 Difference]: With dead ends: 80823 [2022-11-03 03:36:20,531 INFO L226 Difference]: Without dead ends: 47180 [2022-11-03 03:36:20,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:36:20,749 INFO L413 NwaCegarLoop]: 1639 mSDtfsCounter, 1118 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:20,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 3527 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 982 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 03:36:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47180 states.