./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:41:29,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:41:29,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:41:29,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:41:29,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:41:29,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:41:29,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:41:29,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:41:29,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:41:29,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:41:29,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:41:29,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:41:29,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:41:29,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:41:29,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:41:29,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:41:29,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:41:29,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:41:29,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:41:29,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:41:29,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:41:29,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:41:29,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:41:29,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:41:29,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:41:29,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:41:29,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:41:29,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:41:29,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:41:29,619 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:41:29,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:41:29,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:41:29,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:41:29,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:41:29,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:41:29,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:41:29,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:41:29,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:41:29,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:41:29,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:41:29,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:41:29,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:41:29,693 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:41:29,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:41:29,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:41:29,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:41:29,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:41:29,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:41:29,698 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:41:29,698 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:41:29,699 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:41:29,699 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:41:29,700 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:41:29,701 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:41:29,701 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:41:29,701 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:41:29,702 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:41:29,702 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:41:29,702 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:41:29,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:41:29,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:41:29,704 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:41:29,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:41:29,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:41:29,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:41:29,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:41:29,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:41:29,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:41:29,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:41:29,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:41:29,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:41:29,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:41:29,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:41:29,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:41:29,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:41:29,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:41:29,708 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:41:29,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:41:29,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:41:29,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:41:29,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:41:29,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:41:29,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:41:29,710 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_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f12bfc45347636ba11cd9198984e4ca6a9fb471afaf773fd02be6e88eb44e8c [2022-11-19 07:41:30,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:41:30,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:41:30,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:41:30,117 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:41:30,118 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:41:30,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2022-11-19 07:41:30,215 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/data/0aae1e557/4a00d2949cf34e6086ea7e2806c7b142/FLAG60d566538 [2022-11-19 07:41:30,786 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:41:30,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c [2022-11-19 07:41:30,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/data/0aae1e557/4a00d2949cf34e6086ea7e2806c7b142/FLAG60d566538 [2022-11-19 07:41:31,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/data/0aae1e557/4a00d2949cf34e6086ea7e2806c7b142 [2022-11-19 07:41:31,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:41:31,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:41:31,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:41:31,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:41:31,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:41:31,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca6b2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31, skipping insertion in model container [2022-11-19 07:41:31,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:41:31,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:41:31,420 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2022-11-19 07:41:31,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:41:31,456 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:41:31,472 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound5.c[524,537] [2022-11-19 07:41:31,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:41:31,500 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:41:31,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31 WrapperNode [2022-11-19 07:41:31,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:41:31,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:41:31,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:41:31,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:41:31,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,557 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-19 07:41:31,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:41:31,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:41:31,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:41:31,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:41:31,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,626 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:41:31,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:41:31,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:41:31,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:41:31,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (1/1) ... [2022-11-19 07:41:31,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:41:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:31,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:41:31,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:41:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:41:31,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:41:31,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:41:31,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:41:31,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:41:31,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:41:31,854 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:41:31,856 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:41:32,146 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:41:32,323 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:41:32,324 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:41:32,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:32 BoogieIcfgContainer [2022-11-19 07:41:32,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:41:32,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:41:32,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:41:32,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:41:32,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:31" (1/3) ... [2022-11-19 07:41:32,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7028bc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:32, skipping insertion in model container [2022-11-19 07:41:32,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:31" (2/3) ... [2022-11-19 07:41:32,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7028bc62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:32, skipping insertion in model container [2022-11-19 07:41:32,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:32" (3/3) ... [2022-11-19 07:41:32,358 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound5.c [2022-11-19 07:41:32,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:41:32,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:41:32,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:41:32,504 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;@249d84c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:41:32,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:41:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:41:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:41:32,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:32,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:41:32,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:32,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:32,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1275866824, now seen corresponding path program 1 times [2022-11-19 07:41:32,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:32,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103090132] [2022-11-19 07:41:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:32,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:32,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103090132] [2022-11-19 07:41:32,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:41:32,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141733254] [2022-11-19 07:41:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:32,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:32,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:32,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:41:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 07:41:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:32,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:41:32,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141733254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:32,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:41:32,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:41:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067935666] [2022-11-19 07:41:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:41:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:41:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:41:32,955 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:33,028 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-11-19 07:41:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:41:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:41:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:33,072 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:41:33,072 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 07:41:33,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:41:33,082 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:33,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:41:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 07:41:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 07:41:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-19 07:41:33,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2022-11-19 07:41:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:33,158 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-19 07:41:33,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-19 07:41:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:41:33,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:33,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:33,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:33,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:33,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1770432352, now seen corresponding path program 1 times [2022-11-19 07:41:33,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283832626] [2022-11-19 07:41:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:33,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:33,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283832626] [2022-11-19 07:41:33,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:41:33,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693040434] [2022-11-19 07:41:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:33,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:33,465 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:33,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:41:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:41:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:33,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:41:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693040434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:33,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:41:33,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:41:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062921690] [2022-11-19 07:41:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:41:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:33,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:41:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:41:33,624 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:33,659 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-19 07:41:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:41:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:41:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:33,661 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:41:33,661 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 07:41:33,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:41:33,664 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:33,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:41:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 07:41:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 07:41:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-19 07:41:33,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2022-11-19 07:41:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:33,673 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-19 07:41:33,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-19 07:41:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:41:33,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:33,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:33,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 07:41:33,882 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1768644892, now seen corresponding path program 1 times [2022-11-19 07:41:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417803808] [2022-11-19 07:41:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:33,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:33,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121860099] [2022-11-19 07:41:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:33,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:33,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:33,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:41:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:41:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:34,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:41:34,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417803808] [2022-11-19 07:41:34,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121860099] [2022-11-19 07:41:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121860099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:34,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:41:34,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:41:34,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968793268] [2022-11-19 07:41:34,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:34,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:41:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:41:34,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:41:34,074 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:34,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:34,148 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-19 07:41:34,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:41:34,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:41:34,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:34,150 INFO L225 Difference]: With dead ends: 25 [2022-11-19 07:41:34,150 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 07:41:34,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:41:34,152 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:34,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:41:34,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 07:41:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-19 07:41:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:41:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-19 07:41:34,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2022-11-19 07:41:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:34,165 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-19 07:41:34,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:41:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-19 07:41:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:41:34,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:34,167 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:34,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:34,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:34,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:34,375 INFO L85 PathProgramCache]: Analyzing trace with hash 167458353, now seen corresponding path program 1 times [2022-11-19 07:41:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:34,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084415111] [2022-11-19 07:41:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:34,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:34,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:34,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553515311] [2022-11-19 07:41:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:34,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:34,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:41:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:34,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:41:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:34,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:35,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084415111] [2022-11-19 07:41:35,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553515311] [2022-11-19 07:41:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553515311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346600224] [2022-11-19 07:41:35,344 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 07:41:35,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:35,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:35,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:35,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:35,795 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:41:35,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:37,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [346600224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:41:37,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2022-11-19 07:41:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054053418] [2022-11-19 07:41:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:41:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:41:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:41:37,122 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:41:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:37,301 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-19 07:41:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:41:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-19 07:41:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:37,310 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:41:37,310 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:41:37,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:41:37,320 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:37,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:41:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:41:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 07:41:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:41:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-19 07:41:37,336 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-19 07:41:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:37,336 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-19 07:41:37,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:41:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-19 07:41:37,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:41:37,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:37,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:37,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:41:37,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:37,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1288276564, now seen corresponding path program 1 times [2022-11-19 07:41:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76216138] [2022-11-19 07:41:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:37,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332071507] [2022-11-19 07:41:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:37,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:37,562 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:37,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:41:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:41:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:37,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:37,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:37,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76216138] [2022-11-19 07:41:37,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332071507] [2022-11-19 07:41:37,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332071507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:37,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5868284] [2022-11-19 07:41:37,743 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 07:41:37,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:37,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:37,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:37,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:39,018 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-19 07:41:39,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:40,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '509#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 07:41:40,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:40,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-19 07:41:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399232473] [2022-11-19 07:41:40,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:41:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:41:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:41:40,185 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:40,331 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-19 07:41:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:41:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-19 07:41:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:40,333 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:41:40,333 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 07:41:40,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:41:40,334 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:40,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:41:40,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 07:41:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-19 07:41:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:41:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-11-19 07:41:40,348 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2022-11-19 07:41:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:40,348 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-11-19 07:41:40,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-11-19 07:41:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:41:40,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:40,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:40,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:40,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:40,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:40,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1286489104, now seen corresponding path program 1 times [2022-11-19 07:41:40,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:40,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231164235] [2022-11-19 07:41:40,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:40,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:40,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:40,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979550663] [2022-11-19 07:41:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:40,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:40,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:40,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:40,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:41:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:41:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:42,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:43,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231164235] [2022-11-19 07:41:43,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979550663] [2022-11-19 07:41:43,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979550663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772492142] [2022-11-19 07:41:43,797 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:41:43,797 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:43,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:43,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:43,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:44,704 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 36 for LOIs [2022-11-19 07:41:44,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:45,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '759#(and (< ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:45,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:45,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-19 07:41:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230268175] [2022-11-19 07:41:45,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:41:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:41:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:41:45,937 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:46,771 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-11-19 07:41:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:41:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-19 07:41:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:46,779 INFO L225 Difference]: With dead ends: 57 [2022-11-19 07:41:46,779 INFO L226 Difference]: Without dead ends: 55 [2022-11-19 07:41:46,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:41:46,781 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:46,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:41:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-19 07:41:46,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-11-19 07:41:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:41:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-19 07:41:46,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 15 [2022-11-19 07:41:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:46,801 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-19 07:41:46,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-19 07:41:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:41:46,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:46,803 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:46,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 07:41:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:41:47,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1954110013, now seen corresponding path program 1 times [2022-11-19 07:41:47,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:47,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749795836] [2022-11-19 07:41:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:47,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:47,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708499449] [2022-11-19 07:41:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:47,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:47,027 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:47,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:41:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:47,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:41:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:41:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:41:47,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:47,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749795836] [2022-11-19 07:41:47,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708499449] [2022-11-19 07:41:47,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708499449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:47,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19889958] [2022-11-19 07:41:47,513 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 07:41:47,514 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:47,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:47,514 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:47,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:48,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2022-11-19 07:41:48,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:50,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1042#(and (< ~counter~0 6) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:41:50,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:50,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:50,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-19 07:41:50,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311573326] [2022-11-19 07:41:50,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:50,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:41:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:41:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:41:50,214 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:41:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:50,586 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-19 07:41:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:41:50,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-19 07:41:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:50,588 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:41:50,588 INFO L226 Difference]: Without dead ends: 48 [2022-11-19 07:41:50,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:41:50,589 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:50,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:41:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-19 07:41:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-19 07:41:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:41:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-19 07:41:50,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2022-11-19 07:41:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:50,613 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-19 07:41:50,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:41:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-19 07:41:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:41:50,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:50,614 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:50,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:50,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:50,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2145344073, now seen corresponding path program 1 times [2022-11-19 07:41:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259470458] [2022-11-19 07:41:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:50,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:50,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:50,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829548373] [2022-11-19 07:41:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:50,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:41:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:41:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:41:51,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:41:51,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259470458] [2022-11-19 07:41:51,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829548373] [2022-11-19 07:41:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829548373] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:51,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:41:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-19 07:41:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098793651] [2022-11-19 07:41:51,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:41:51,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:41:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:41:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:41:51,630 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:51,687 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-19 07:41:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:41:51,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-19 07:41:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:51,688 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:41:51,689 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 07:41:51,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:41:51,690 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:51,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:41:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 07:41:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-19 07:41:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:41:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-19 07:41:51,703 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 26 [2022-11-19 07:41:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:51,703 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-19 07:41:51,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:41:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-19 07:41:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:41:51,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:51,705 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-19 07:41:51,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:41:51,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 542049488, now seen corresponding path program 2 times [2022-11-19 07:41:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154799961] [2022-11-19 07:41:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:51,940 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:51,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051197746] [2022-11-19 07:41:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:41:51,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:51,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:51,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:41:52,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:41:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:41:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:41:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:41:52,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:41:52,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154799961] [2022-11-19 07:41:52,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:41:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051197746] [2022-11-19 07:41:52,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051197746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763396260] [2022-11-19 07:41:52,229 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 07:41:52,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:52,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:52,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:52,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:52,933 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 63 for LOIs [2022-11-19 07:41:53,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:41:54,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1723#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 07:41:54,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:41:54,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:41:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2022-11-19 07:41:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485015182] [2022-11-19 07:41:54,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:41:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:41:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:41:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:41:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:41:54,352 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:41:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:54,487 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-11-19 07:41:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:41:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 39 [2022-11-19 07:41:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:54,491 INFO L225 Difference]: With dead ends: 59 [2022-11-19 07:41:54,492 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:41:54,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:41:54,493 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:54,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:41:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:41:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-19 07:41:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 07:41:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-19 07:41:54,508 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2022-11-19 07:41:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:54,509 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-19 07:41:54,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:41:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-19 07:41:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:41:54,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:54,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-19 07:41:54,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:54,718 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1601499612, now seen corresponding path program 3 times [2022-11-19 07:41:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007891851] [2022-11-19 07:41:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:54,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:54,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:41:54,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223076674] [2022-11-19 07:41:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:41:54,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:54,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:54,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:41:55,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:41:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-19 07:41:55,235 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:41:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:41:55,377 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:41:55,378 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:41:55,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:41:55,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:55,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:55,592 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:55,595 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:41:55,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:41:55 BoogieIcfgContainer [2022-11-19 07:41:55,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:41:55,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:41:55,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:41:55,633 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:41:55,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:32" (3/4) ... [2022-11-19 07:41:55,636 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:41:55,699 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:41:55,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:41:55,700 INFO L158 Benchmark]: Toolchain (without parser) took 24585.96ms. Allocated memory was 109.1MB in the beginning and 211.8MB in the end (delta: 102.8MB). Free memory was 66.7MB in the beginning and 126.3MB in the end (delta: -59.6MB). Peak memory consumption was 43.9MB. Max. memory is 16.1GB. [2022-11-19 07:41:55,700 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 83.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:41:55,701 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.59ms. Allocated memory is still 109.1MB. Free memory was 66.5MB in the beginning and 82.9MB in the end (delta: -16.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:41:55,701 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.94ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:41:55,701 INFO L158 Benchmark]: Boogie Preprocessor took 61.06ms. Allocated memory is still 109.1MB. Free memory was 81.3MB in the beginning and 80.4MB in the end (delta: 866.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:41:55,702 INFO L158 Benchmark]: RCFGBuilder took 709.39ms. Allocated memory is still 109.1MB. Free memory was 80.4MB in the beginning and 62.0MB in the end (delta: 18.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-19 07:41:55,702 INFO L158 Benchmark]: TraceAbstraction took 23289.36ms. Allocated memory was 109.1MB in the beginning and 211.8MB in the end (delta: 102.8MB). Free memory was 61.1MB in the beginning and 129.4MB in the end (delta: -68.3MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2022-11-19 07:41:55,702 INFO L158 Benchmark]: Witness Printer took 66.55ms. Allocated memory is still 211.8MB. Free memory was 129.4MB in the beginning and 126.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:41:55,704 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 83.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.59ms. Allocated memory is still 109.1MB. Free memory was 66.5MB in the beginning and 82.9MB in the end (delta: -16.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.94ms. Allocated memory is still 109.1MB. Free memory was 82.9MB in the beginning and 81.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 61.06ms. Allocated memory is still 109.1MB. Free memory was 81.3MB in the beginning and 80.4MB in the end (delta: 866.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 709.39ms. Allocated memory is still 109.1MB. Free memory was 80.4MB in the beginning and 62.0MB in the end (delta: 18.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 23289.36ms. Allocated memory was 109.1MB in the beginning and 211.8MB in the end (delta: 102.8MB). Free memory was 61.1MB in the beginning and 129.4MB in the end (delta: -68.3MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Witness Printer took 66.55ms. Allocated memory is still 211.8MB. Free memory was 129.4MB in the beginning and 126.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=64, b=64, counter=0, p=1, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=64, b=64, counter=1, counter++=0, p=1, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=64, b=64, counter=1, p=1, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=32, b=32, counter=1, p=4, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=32, b=32, counter=2, counter++=1, p=4, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=32, b=32, counter=2, p=4, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=16, b=16, counter=2, p=16, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=16, b=16, counter=3, counter++=2, p=16, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=16, b=16, counter=3, p=16, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=8, b=8, counter=3, p=64, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=8, b=8, counter=4, counter++=3, p=64, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=8, b=8, counter=4, p=64, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=4, b=4, counter=4, p=256, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=4, b=4, counter=5, counter++=4, p=256, q=0, x=64, y=64] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=4, counter=5, p=256, q=0, x=64, y=64] [L36] COND FALSE !(!(a != 0 && b != 0)) [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=2, counter=5, p=1024, q=0, x=64, y=64] [L33] EXPR counter++ VAL [a=2, b=2, counter=6, counter++=5, p=1024, q=0, x=64, y=64] [L33] COND FALSE !(counter++<5) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.1s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 109 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 101 mSDsluCounter, 401 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 284 mSDsCounter, 38 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 363 IncrementalHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 38 mSolverCounterUnsat, 117 mSDtfsCounter, 363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 379 GetRequests, 257 SyntacticMatches, 9 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=9, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 263 ConstructedInterpolants, 0 QuantifiedInterpolants, 1415 SizeOfPredicates, 41 NumberOfNonLiveVariables, 693 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 109/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 11, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 17, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 66, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:41:55,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c1637f7-1b13-4490-b851-b16fae8a13ee/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE