./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/motivex.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/motivex.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0 --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 849df4b411c63057254dcf3e90c1516f0bf7c8598b238d4e2298c0311f6d39f4 --- 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-e04fb08 [2022-11-16 15:58:47,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:58:47,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:58:47,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:58:47,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:58:47,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:58:47,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:58:47,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:58:47,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:58:47,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:58:47,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:58:47,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:58:47,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:58:47,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:58:47,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:58:47,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:58:47,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:58:47,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:58:47,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:58:47,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:58:47,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:58:47,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:58:47,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:58:47,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:58:47,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:58:47,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:58:47,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:58:47,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:58:47,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:58:47,669 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:58:47,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:58:47,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:58:47,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:58:47,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:58:47,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:58:47,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:58:47,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:58:47,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:58:47,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:58:47,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:58:47,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:58:47,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 15:58:47,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:58:47,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:58:47,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:58:47,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:58:47,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:58:47,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:58:47,726 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:58:47,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:58:47,727 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:58:47,727 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:58:47,728 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:58:47,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:58:47,729 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:58:47,729 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:58:47,729 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:58:47,729 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:58:47,730 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:58:47,730 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:58:47,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:58:47,731 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:58:47,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:58:47,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:58:47,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:58:47,733 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 15:58:47,733 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:58:47,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 15:58:47,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:58:47,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 15:58:47,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:58:47,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 15:58:47,735 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:58:47,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:58:47,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:58:47,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:58:47,736 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:58:47,736 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:58:47,736 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 15:58:47,736 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:58:47,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:58:47,737 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 15:58:47,737 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:58:47,737 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_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 849df4b411c63057254dcf3e90c1516f0bf7c8598b238d4e2298c0311f6d39f4 [2022-11-16 15:58:48,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:58:48,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:58:48,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:58:48,145 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:58:48,146 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:58:48,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-lopstr16/motivex.i [2022-11-16 15:58:48,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/data/04719d082/1674b9a4d7184bc294ab9c0d39012c6a/FLAG7fbd7c5c2 [2022-11-16 15:58:48,737 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:58:48,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/sv-benchmarks/c/array-lopstr16/motivex.i [2022-11-16 15:58:48,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/data/04719d082/1674b9a4d7184bc294ab9c0d39012c6a/FLAG7fbd7c5c2 [2022-11-16 15:58:49,111 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/data/04719d082/1674b9a4d7184bc294ab9c0d39012c6a [2022-11-16 15:58:49,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:58:49,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:58:49,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:58:49,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:58:49,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:58:49,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19fee0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49, skipping insertion in model container [2022-11-16 15:58:49,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:58:49,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:58:49,325 WARN L229 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_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/sv-benchmarks/c/array-lopstr16/motivex.i[800,813] [2022-11-16 15:58:49,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:58:49,629 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:58:49,643 WARN L229 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_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/sv-benchmarks/c/array-lopstr16/motivex.i[800,813] [2022-11-16 15:58:49,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:58:49,703 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:58:49,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49 WrapperNode [2022-11-16 15:58:49,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:58:49,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:58:49,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:58:49,705 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:58:49,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,755 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-16 15:58:49,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:58:49,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:58:49,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:58:49,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:58:49,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,796 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:58:49,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:58:49,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:58:49,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:58:49,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (1/1) ... [2022-11-16 15:58:49,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:58:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:49,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:58:49,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:58:49,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:58:49,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:58:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:58:49,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:58:49,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:58:49,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:58:49,982 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:58:49,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:58:50,224 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:58:50,293 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:58:50,294 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 15:58:50,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:58:50 BoogieIcfgContainer [2022-11-16 15:58:50,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:58:50,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:58:50,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:58:50,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:58:50,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:58:49" (1/3) ... [2022-11-16 15:58:50,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed1dc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:58:50, skipping insertion in model container [2022-11-16 15:58:50,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:58:49" (2/3) ... [2022-11-16 15:58:50,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed1dc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:58:50, skipping insertion in model container [2022-11-16 15:58:50,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:58:50" (3/3) ... [2022-11-16 15:58:50,307 INFO L112 eAbstractionObserver]: Analyzing ICFG motivex.i [2022-11-16 15:58:50,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:58:50,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 15:58:50,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:58:50,402 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;@1eca493e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:58:50,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 15:58:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 15:58:50,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:50,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 15:58:50,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:50,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1242080018, now seen corresponding path program 1 times [2022-11-16 15:58:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:50,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713575240] [2022-11-16 15:58:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:50,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713575240] [2022-11-16 15:58:50,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 15:58:50,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533388151] [2022-11-16 15:58:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:50,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:50,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:58:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 15:58:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:58:50,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:58:50,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533388151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:58:50,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:58:50,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 15:58:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991139871] [2022-11-16 15:58:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:58:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:58:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:58:50,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:50,870 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:50,944 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-16 15:58:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:58:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 15:58:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:50,956 INFO L225 Difference]: With dead ends: 23 [2022-11-16 15:58:50,957 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 15:58:50,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:58:50,966 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:50,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:58:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 15:58:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-16 15:58:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-16 15:58:51,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-16 15:58:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-16 15:58:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-16 15:58:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 15:58:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:51,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:58:51,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 15:58:51,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1620251835, now seen corresponding path program 1 times [2022-11-16 15:58:51,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:51,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93658422] [2022-11-16 15:58:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:51,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93658422] [2022-11-16 15:58:51,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 15:58:51,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85080313] [2022-11-16 15:58:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:51,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:58:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:51,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 15:58:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:58:51,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:58:51,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85080313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:51,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [30539969] [2022-11-16 15:58:51,501 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:58:51,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:58:51,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:58:51,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:58:51,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:58:51,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-16 15:58:51,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-16 15:58:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:58:51,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-16 15:58:51,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 15:58:51,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:52,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:52,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:52,180 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:58:52,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-16 15:58:52,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:58:52,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:58:52,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-16 15:58:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709414148] [2022-11-16 15:58:52,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:52,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:58:52,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:58:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-16 15:58:52,548 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:52,644 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-16 15:58:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:58:52,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 15:58:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:52,646 INFO L225 Difference]: With dead ends: 39 [2022-11-16 15:58:52,646 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 15:58:52,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-16 15:58:52,649 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:52,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 15:58:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-16 15:58:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-16 15:58:52,667 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-16 15:58:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:52,667 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-16 15:58:52,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-16 15:58:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 15:58:52,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:52,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-16 15:58:52,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 15:58:52,874 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash 113589934, now seen corresponding path program 2 times [2022-11-16 15:58:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010167131] [2022-11-16 15:58:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:52,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:58:52,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343413015] [2022-11-16 15:58:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:58:52,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:52,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:52,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:58:53,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:58:53,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:58:53,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 15:58:53,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 15:58:53,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 15:58:53,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010167131] [2022-11-16 15:58:53,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:58:53,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343413015] [2022-11-16 15:58:53,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343413015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921743069] [2022-11-16 15:58:53,209 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:58:53,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:58:53,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:58:53,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:58:53,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:58:53,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-16 15:58:53,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-16 15:58:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:58:53,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-16 15:58:53,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 15:58:53,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:58:53,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-16 15:58:53,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:53,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:53,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:58:53,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-16 15:58:53,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:58:53,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:58:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 15:58:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966120485] [2022-11-16 15:58:53,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 15:58:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:53,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 15:58:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-16 15:58:53,902 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:54,071 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-11-16 15:58:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 15:58:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 15:58:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:54,073 INFO L225 Difference]: With dead ends: 84 [2022-11-16 15:58:54,073 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 15:58:54,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-16 15:58:54,075 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:54,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:58:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 15:58:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2022-11-16 15:58:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-16 15:58:54,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-16 15:58:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:54,081 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-16 15:58:54,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-16 15:58:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 15:58:54,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:54,083 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-16 15:58:54,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:54,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1213960882, now seen corresponding path program 3 times [2022-11-16 15:58:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774622053] [2022-11-16 15:58:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:54,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:58:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310266036] [2022-11-16 15:58:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:58:54,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:54,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:54,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:58:54,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:58:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:58:54,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 15:58:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 15:58:54,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 15:58:54,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774622053] [2022-11-16 15:58:54,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:58:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310266036] [2022-11-16 15:58:54,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310266036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:54,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290459851] [2022-11-16 15:58:54,832 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:58:54,833 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:58:54,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:58:54,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:58:54,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:58:54,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-16 15:58:54,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-16 15:58:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:58:54,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 188 [2022-11-16 15:58:54,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 15:58:54,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:55,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:55,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:55,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:58:55,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-16 15:58:55,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:58:55,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:58:55,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-16 15:58:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833458581] [2022-11-16 15:58:55,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:55,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 15:58:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:55,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 15:58:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-16 15:58:55,443 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:55,842 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2022-11-16 15:58:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 15:58:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 15:58:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:55,845 INFO L225 Difference]: With dead ends: 174 [2022-11-16 15:58:55,845 INFO L226 Difference]: Without dead ends: 158 [2022-11-16 15:58:55,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-16 15:58:55,847 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:55,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 15:58:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-16 15:58:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2022-11-16 15:58:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-16 15:58:55,858 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-16 15:58:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:55,858 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-16 15:58:55,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-16 15:58:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 15:58:55,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:55,860 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-16 15:58:55,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:56,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:56,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2057233038, now seen corresponding path program 4 times [2022-11-16 15:58:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145285901] [2022-11-16 15:58:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:56,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:56,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:58:56,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620449485] [2022-11-16 15:58:56,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 15:58:56,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:56,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:56,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 15:58:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:58:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 15:58:56,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:58:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-16 15:58:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:58:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-16 15:58:57,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:58:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145285901] [2022-11-16 15:58:57,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:58:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620449485] [2022-11-16 15:58:57,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620449485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:58:57,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881094610] [2022-11-16 15:58:57,569 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 15:58:57,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:58:57,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:58:57,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:58:57,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:58:57,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-16 15:58:57,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-16 15:58:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:58:57,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-16 15:58:57,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 15:58:57,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:57,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:57,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 15:58:57,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:58:58,663 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-16 15:58:58,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:58:58,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:58:58,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-16 15:58:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009356024] [2022-11-16 15:58:58,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:58:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 15:58:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:58:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 15:58:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 15:58:58,667 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:58:59,589 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2022-11-16 15:58:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 15:58:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-16 15:58:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:58:59,594 INFO L225 Difference]: With dead ends: 354 [2022-11-16 15:58:59,594 INFO L226 Difference]: Without dead ends: 326 [2022-11-16 15:58:59,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 15:58:59,597 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 684 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 15:58:59,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 138 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 15:58:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-16 15:58:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-11-16 15:58:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-16 15:58:59,611 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-16 15:58:59,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:58:59,612 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-16 15:58:59,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:58:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-16 15:58:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 15:58:59,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:58:59,614 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-16 15:58:59,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 15:58:59,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:59,821 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:58:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:58:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash 903621902, now seen corresponding path program 5 times [2022-11-16 15:58:59,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:58:59,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038352591] [2022-11-16 15:58:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:58:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:58:59,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:58:59,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934401112] [2022-11-16 15:58:59,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:58:59,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:58:59,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:58:59,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:58:59,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcbf8256-d51f-4dbe-b1c8-dd879aec4d92/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process