./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW --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 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a --- 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-4e7fbc6 [2022-11-23 14:21:32,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:21:32,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:21:32,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:21:32,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:21:32,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:21:32,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:21:32,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:21:32,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:21:32,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:21:32,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:21:32,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:21:32,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:21:32,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:21:32,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:21:32,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:21:32,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:21:32,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:21:32,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:21:32,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:21:32,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:21:32,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:21:32,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:21:32,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:21:32,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:21:32,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:21:32,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:21:32,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:21:32,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:21:32,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:21:32,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:21:32,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:21:32,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:21:32,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:21:32,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:21:32,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:21:32,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:21:32,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:21:32,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:21:32,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:21:32,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:21:32,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:21:32,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:21:32,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:21:32,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:21:32,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:21:32,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:21:32,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:21:32,762 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:21:32,762 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:21:32,762 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:21:32,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:21:32,764 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:21:32,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:21:32,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:21:32,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:21:32,764 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:21:32,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:21:32,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:21:32,765 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:21:32,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:21:32,766 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:21:32,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:21:32,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:21:32,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:21:32,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:21:32,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:21:32,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:21:32,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:21:32,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:21:32,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:21:32,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:21:32,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:21:32,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:21:32,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:21:32,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:21:32,770 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:21:32,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:21:32,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:21:32,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:21:32,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:21:32,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:21:32,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:21:32,771 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_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d2ad25966f5b06d930031b35708c7035a644982dad73f08910281a8c7df501a [2022-11-23 14:21:33,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:21:33,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:21:33,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:21:33,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:21:33,153 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:21:33,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-23 14:21:36,329 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:21:36,699 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:21:36,700 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-23 14:21:36,717 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/data/8e887b126/d3f8f2bbb2124e3b8b398e35c96b4474/FLAG18f28a9b0 [2022-11-23 14:21:36,736 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/data/8e887b126/d3f8f2bbb2124e3b8b398e35c96b4474 [2022-11-23 14:21:36,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:21:36,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:21:36,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:21:36,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:21:36,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:21:36,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:36" (1/1) ... [2022-11-23 14:21:36,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22241a6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:36, skipping insertion in model container [2022-11-23 14:21:36,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:36" (1/1) ... [2022-11-23 14:21:36,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:21:36,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:21:37,138 WARN L237 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_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-23 14:21:37,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:21:37,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:21:37,221 WARN L237 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_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-23 14:21:37,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:21:37,260 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:21:37,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37 WrapperNode [2022-11-23 14:21:37,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:21:37,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:21:37,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:21:37,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:21:37,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,316 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 320 [2022-11-23 14:21:37,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:21:37,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:21:37,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:21:37,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:21:37,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,347 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:21:37,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:21:37,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:21:37,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:21:37,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (1/1) ... [2022-11-23 14:21:37,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:21:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:37,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:21:37,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:21:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:21:37,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:21:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:21:37,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:21:37,595 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:21:37,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:21:38,102 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:21:38,289 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:21:38,289 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:21:38,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:38 BoogieIcfgContainer [2022-11-23 14:21:38,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:21:38,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:21:38,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:21:38,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:21:38,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:21:36" (1/3) ... [2022-11-23 14:21:38,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c439c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:38, skipping insertion in model container [2022-11-23 14:21:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:37" (2/3) ... [2022-11-23 14:21:38,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c439c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:38, skipping insertion in model container [2022-11-23 14:21:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:38" (3/3) ... [2022-11-23 14:21:38,312 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-23 14:21:38,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:21:38,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:21:38,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:21:38,434 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;@697ccd22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:21:38,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:21:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 58 states have internal predecessors, (96), 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) [2022-11-23 14:21:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:21:38,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:38,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:38,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:38,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1038232587, now seen corresponding path program 1 times [2022-11-23 14:21:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:38,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13074758] [2022-11-23 14:21:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:38,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13074758] [2022-11-23 14:21:38,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13074758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:38,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:38,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:21:38,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695415044] [2022-11-23 14:21:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:38,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:21:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:21:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,033 INFO L87 Difference]: Start difference. First operand has 59 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 58 states have internal predecessors, (96), 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 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-11-23 14:21:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:39,189 INFO L93 Difference]: Finished difference Result 133 states and 205 transitions. [2022-11-23 14:21:39,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:21:39,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2022-11-23 14:21:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:39,205 INFO L225 Difference]: With dead ends: 133 [2022-11-23 14:21:39,205 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 14:21:39,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,213 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 67 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:39,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 182 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:21:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 14:21:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-11-23 14:21:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 86 states have internal predecessors, (120), 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) [2022-11-23 14:21:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2022-11-23 14:21:39,300 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 28 [2022-11-23 14:21:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:39,301 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2022-11-23 14:21:39,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-11-23 14:21:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2022-11-23 14:21:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:21:39,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:39,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:39,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:21:39,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1349947809, now seen corresponding path program 1 times [2022-11-23 14:21:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:39,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731384426] [2022-11-23 14:21:39,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:39,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:39,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731384426] [2022-11-23 14:21:39,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731384426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:39,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:39,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:21:39,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103964490] [2022-11-23 14:21:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:39,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:21:39,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:21:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,441 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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) [2022-11-23 14:21:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:39,506 INFO L93 Difference]: Finished difference Result 201 states and 288 transitions. [2022-11-23 14:21:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:21:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2022-11-23 14:21:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:39,509 INFO L225 Difference]: With dead ends: 201 [2022-11-23 14:21:39,509 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 14:21:39,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,512 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 49 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:39,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:21:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 14:21:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-11-23 14:21:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4153846153846155) internal successors, (184), 130 states have internal predecessors, (184), 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) [2022-11-23 14:21:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 184 transitions. [2022-11-23 14:21:39,543 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 184 transitions. Word has length 30 [2022-11-23 14:21:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:39,543 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 184 transitions. [2022-11-23 14:21:39,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-11-23 14:21:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 184 transitions. [2022-11-23 14:21:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:21:39,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:39,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:39,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:21:39,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:39,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:39,549 INFO L85 PathProgramCache]: Analyzing trace with hash 726546740, now seen corresponding path program 1 times [2022-11-23 14:21:39,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:39,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826807544] [2022-11-23 14:21:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:39,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:39,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:39,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826807544] [2022-11-23 14:21:39,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826807544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:39,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:39,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:21:39,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196943267] [2022-11-23 14:21:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:21:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:39,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:21:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,665 INFO L87 Difference]: Start difference. First operand 131 states and 184 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-23 14:21:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:39,737 INFO L93 Difference]: Finished difference Result 311 states and 446 transitions. [2022-11-23 14:21:39,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:21:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 33 [2022-11-23 14:21:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:39,741 INFO L225 Difference]: With dead ends: 311 [2022-11-23 14:21:39,741 INFO L226 Difference]: Without dead ends: 199 [2022-11-23 14:21:39,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:39,744 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:39,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 119 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:21:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-23 14:21:39,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2022-11-23 14:21:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 196 states have internal predecessors, (276), 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) [2022-11-23 14:21:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2022-11-23 14:21:39,800 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 33 [2022-11-23 14:21:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:39,801 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2022-11-23 14:21:39,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-23 14:21:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2022-11-23 14:21:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:21:39,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:39,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:39,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:21:39,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1106358226, now seen corresponding path program 1 times [2022-11-23 14:21:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592621925] [2022-11-23 14:21:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:39,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:39,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592621925] [2022-11-23 14:21:39,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592621925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:39,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:39,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:21:39,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408377076] [2022-11-23 14:21:39,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:39,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:21:39,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:21:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:21:39,953 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-23 14:21:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:40,170 INFO L93 Difference]: Finished difference Result 643 states and 911 transitions. [2022-11-23 14:21:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:21:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 36 [2022-11-23 14:21:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:40,173 INFO L225 Difference]: With dead ends: 643 [2022-11-23 14:21:40,173 INFO L226 Difference]: Without dead ends: 465 [2022-11-23 14:21:40,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:21:40,176 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 126 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:40,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 218 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:21:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-23 14:21:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 461. [2022-11-23 14:21:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4086956521739131) internal successors, (648), 460 states have internal predecessors, (648), 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) [2022-11-23 14:21:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 648 transitions. [2022-11-23 14:21:40,351 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 648 transitions. Word has length 36 [2022-11-23 14:21:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:40,351 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 648 transitions. [2022-11-23 14:21:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-23 14:21:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 648 transitions. [2022-11-23 14:21:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 14:21:40,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:40,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:21:40,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:40,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -91860297, now seen corresponding path program 1 times [2022-11-23 14:21:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:40,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953005754] [2022-11-23 14:21:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:40,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953005754] [2022-11-23 14:21:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953005754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:40,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:40,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:21:40,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177004301] [2022-11-23 14:21:40,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:40,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:21:40,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:21:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:21:40,469 INFO L87 Difference]: Start difference. First operand 461 states and 648 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-23 14:21:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:40,851 INFO L93 Difference]: Finished difference Result 1186 states and 1688 transitions. [2022-11-23 14:21:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:21:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 38 [2022-11-23 14:21:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:40,857 INFO L225 Difference]: With dead ends: 1186 [2022-11-23 14:21:40,857 INFO L226 Difference]: Without dead ends: 744 [2022-11-23 14:21:40,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:21:40,867 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 286 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:40,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 82 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:21:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-23 14:21:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 742. [2022-11-23 14:21:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 1.4062078272604588) internal successors, (1042), 741 states have internal predecessors, (1042), 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) [2022-11-23 14:21:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1042 transitions. [2022-11-23 14:21:41,138 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1042 transitions. Word has length 38 [2022-11-23 14:21:41,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:41,140 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 1042 transitions. [2022-11-23 14:21:41,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-11-23 14:21:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1042 transitions. [2022-11-23 14:21:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 14:21:41,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:41,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:41,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:21:41,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash -279226660, now seen corresponding path program 1 times [2022-11-23 14:21:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017191845] [2022-11-23 14:21:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:41,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:41,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:41,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017191845] [2022-11-23 14:21:41,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017191845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:41,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:41,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:21:41,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083544351] [2022-11-23 14:21:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:41,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:21:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:21:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:21:41,622 INFO L87 Difference]: Start difference. First operand 742 states and 1042 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-11-23 14:21:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:42,432 INFO L93 Difference]: Finished difference Result 1571 states and 2228 transitions. [2022-11-23 14:21:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:21:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-23 14:21:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:42,440 INFO L225 Difference]: With dead ends: 1571 [2022-11-23 14:21:42,440 INFO L226 Difference]: Without dead ends: 1569 [2022-11-23 14:21:42,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:21:42,450 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 475 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 597 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:21:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-11-23 14:21:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 853. [2022-11-23 14:21:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.4049295774647887) internal successors, (1197), 852 states have internal predecessors, (1197), 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) [2022-11-23 14:21:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1197 transitions. [2022-11-23 14:21:42,752 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1197 transitions. Word has length 38 [2022-11-23 14:21:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:42,753 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1197 transitions. [2022-11-23 14:21:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-11-23 14:21:42,753 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1197 transitions. [2022-11-23 14:21:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:21:42,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:42,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:21:42,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:42,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1957048105, now seen corresponding path program 1 times [2022-11-23 14:21:42,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:42,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441964830] [2022-11-23 14:21:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:43,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441964830] [2022-11-23 14:21:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441964830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:21:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150697869] [2022-11-23 14:21:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:43,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:43,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:43,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:21:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 14:21:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:45,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:21:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:50,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150697869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:21:50,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524440795] [2022-11-23 14:21:50,243 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 14:21:50,243 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:21:50,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:21:50,256 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:21:50,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:21:50,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:21:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:21:50,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:21:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:50,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:25:14,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:25:32,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10832#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~__return_6163~0) (= ~__return_6228~0 0) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 1 ~__return_6067~0) (<= ~__return_6163~0 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= ~__return_6067~0 1) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:25:32,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:25:32,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:25:32,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-11-23 14:25:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927787713] [2022-11-23 14:25:32,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:25:32,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:25:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:25:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:25:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=4931, Unknown=0, NotChecked=0, Total=5700 [2022-11-23 14:25:32,856 INFO L87 Difference]: Start difference. First operand 853 states and 1197 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2022-11-23 14:26:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:04,435 INFO L93 Difference]: Finished difference Result 9029 states and 12667 transitions. [2022-11-23 14:26:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-23 14:26:04,436 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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 46 [2022-11-23 14:26:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:04,468 INFO L225 Difference]: With dead ends: 9029 [2022-11-23 14:26:04,468 INFO L226 Difference]: Without dead ends: 7758 [2022-11-23 14:26:04,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22227 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=7556, Invalid=45114, Unknown=0, NotChecked=0, Total=52670 [2022-11-23 14:26:04,489 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 6514 mSDsluCounter, 2377 mSDsCounter, 0 mSdLazyCounter, 3420 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6514 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 3763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 3420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:04,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6514 Valid, 2518 Invalid, 3763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [343 Valid, 3420 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 14:26:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7758 states. [2022-11-23 14:26:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7758 to 4088. [2022-11-23 14:26:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 1.3650599461707855) internal successors, (5579), 4087 states have internal predecessors, (5579), 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) [2022-11-23 14:26:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 5579 transitions. [2022-11-23 14:26:05,906 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 5579 transitions. Word has length 46 [2022-11-23 14:26:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:05,906 INFO L495 AbstractCegarLoop]: Abstraction has 4088 states and 5579 transitions. [2022-11-23 14:26:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2022-11-23 14:26:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 5579 transitions. [2022-11-23 14:26:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:26:05,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:05,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:26:05,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:26:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:26:06,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash 637167090, now seen corresponding path program 1 times [2022-11-23 14:26:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:06,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807693079] [2022-11-23 14:26:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:26:06,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807693079] [2022-11-23 14:26:06,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807693079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:26:06,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:26:06,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:26:06,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163647021] [2022-11-23 14:26:06,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:26:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:26:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:26:06,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:26:06,237 INFO L87 Difference]: Start difference. First operand 4088 states and 5579 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-23 14:26:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:26:08,253 INFO L93 Difference]: Finished difference Result 10038 states and 13794 transitions. [2022-11-23 14:26:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:26:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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 46 [2022-11-23 14:26:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:26:08,272 INFO L225 Difference]: With dead ends: 10038 [2022-11-23 14:26:08,272 INFO L226 Difference]: Without dead ends: 6017 [2022-11-23 14:26:08,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:26:08,279 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 265 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:26:08,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:26:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2022-11-23 14:26:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5943. [2022-11-23 14:26:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 5942 states have (on average 1.3648603163917872) internal successors, (8110), 5942 states have internal predecessors, (8110), 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) [2022-11-23 14:26:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 8110 transitions. [2022-11-23 14:26:10,316 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 8110 transitions. Word has length 46 [2022-11-23 14:26:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:26:10,317 INFO L495 AbstractCegarLoop]: Abstraction has 5943 states and 8110 transitions. [2022-11-23 14:26:10,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 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) [2022-11-23 14:26:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 8110 transitions. [2022-11-23 14:26:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:26:10,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:26:10,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:26:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:26:10,319 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:26:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:26:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2031635539, now seen corresponding path program 1 times [2022-11-23 14:26:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:26:10,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635966473] [2022-11-23 14:26:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:26:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:11,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:26:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635966473] [2022-11-23 14:26:11,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635966473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:26:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977489249] [2022-11-23 14:26:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:26:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:26:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:26:11,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:26:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:26:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:26:11,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 14:26:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:26:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:12,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:26:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:26:17,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977489249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:26:17,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953439513] [2022-11-23 14:26:17,105 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 14:26:17,105 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:26:17,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:26:17,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:26:17,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:26:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:26:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:26:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:26:17,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:26:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:26:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:26:17,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:26:32,502 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:26:57,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58858#(and (<= ~send3~0 127) (= ~__return_6228~0 0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6163~0) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= 1 ~__return_6067~0) (<= 0 (+ ~p1_old~0 1)) (<= |ULTIMATE.start_main_~main__i2~0#1| 6) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~send2~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_6163~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= ~send2~0 127) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= ~__return_6067~0 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:26:57,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:26:57,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:26:57,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-11-23 14:26:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375295084] [2022-11-23 14:26:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:26:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:26:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:26:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:26:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=4805, Unknown=0, NotChecked=0, Total=5550 [2022-11-23 14:26:57,116 INFO L87 Difference]: Start difference. First operand 5943 states and 8110 transitions. Second operand has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2022-11-23 14:27:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:27:45,170 INFO L93 Difference]: Finished difference Result 31943 states and 43489 transitions. [2022-11-23 14:27:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-11-23 14:27:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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 46 [2022-11-23 14:27:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:27:45,301 INFO L225 Difference]: With dead ends: 31943 [2022-11-23 14:27:45,301 INFO L226 Difference]: Without dead ends: 27533 [2022-11-23 14:27:45,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29255 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=11055, Invalid=57327, Unknown=0, NotChecked=0, Total=68382 [2022-11-23 14:27:45,327 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 6983 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 4307 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6983 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 4307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:27:45,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6983 Valid, 3438 Invalid, 4735 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [428 Valid, 4307 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-23 14:27:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27533 states. [2022-11-23 14:27:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27533 to 16549. [2022-11-23 14:27:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16549 states, 16548 states have (on average 1.358532753202804) internal successors, (22481), 16548 states have internal predecessors, (22481), 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) [2022-11-23 14:27:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16549 states to 16549 states and 22481 transitions. [2022-11-23 14:27:50,939 INFO L78 Accepts]: Start accepts. Automaton has 16549 states and 22481 transitions. Word has length 46 [2022-11-23 14:27:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:27:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 16549 states and 22481 transitions. [2022-11-23 14:27:50,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 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) [2022-11-23 14:27:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 16549 states and 22481 transitions. [2022-11-23 14:27:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:27:50,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:27:50,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:27:50,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:27:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:51,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:27:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:27:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1874840216, now seen corresponding path program 1 times [2022-11-23 14:27:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:27:51,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371301225] [2022-11-23 14:27:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:51,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:27:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:27:53,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:27:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371301225] [2022-11-23 14:27:53,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371301225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:27:53,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592568944] [2022-11-23 14:27:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:27:53,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:27:53,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:27:53,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:27:53,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:27:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:27:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 14:27:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:27:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:27:54,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:28:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:28:00,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592568944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:28:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673447718] [2022-11-23 14:28:00,455 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-23 14:28:00,455 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:28:00,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:28:00,456 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:28:00,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:28:00,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:28:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:28:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:28:00,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:28:00,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:28:00,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:28:00,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:28:11,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:28:39,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '138043#(and (<= ~send3~0 127) (= ~__return_6228~0 0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6163~0) (<= ~st3~0 0) (<= 1 ~__return_6067~0) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (= ~p2~0 0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= 0 ~st2~0) (<= ~mode3~0 1) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_6163~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (<= ~__return_6067~0 1) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:28:39,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:28:39,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:28:39,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 48 [2022-11-23 14:28:39,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670492948] [2022-11-23 14:28:39,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:28:39,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 14:28:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:28:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 14:28:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=6442, Unknown=0, NotChecked=0, Total=7310 [2022-11-23 14:28:39,436 INFO L87 Difference]: Start difference. First operand 16549 states and 22481 transitions. Second operand has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 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) [2022-11-23 14:29:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:29:37,266 INFO L93 Difference]: Finished difference Result 48768 states and 66262 transitions. [2022-11-23 14:29:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-11-23 14:29:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 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 49 [2022-11-23 14:29:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:29:37,350 INFO L225 Difference]: With dead ends: 48768 [2022-11-23 14:29:37,350 INFO L226 Difference]: Without dead ends: 32641 [2022-11-23 14:29:37,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22708 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=7872, Invalid=48060, Unknown=0, NotChecked=0, Total=55932 [2022-11-23 14:29:37,376 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 6529 mSDsluCounter, 2903 mSDsCounter, 0 mSdLazyCounter, 5378 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6529 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 5679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 5378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:29:37,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6529 Valid, 3050 Invalid, 5679 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [301 Valid, 5378 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 14:29:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32641 states. [2022-11-23 14:29:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32641 to 18512. [2022-11-23 14:29:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18512 states, 18511 states have (on average 1.3573010642320782) internal successors, (25125), 18511 states have internal predecessors, (25125), 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) [2022-11-23 14:29:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18512 states to 18512 states and 25125 transitions. [2022-11-23 14:29:44,447 INFO L78 Accepts]: Start accepts. Automaton has 18512 states and 25125 transitions. Word has length 49 [2022-11-23 14:29:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:29:44,448 INFO L495 AbstractCegarLoop]: Abstraction has 18512 states and 25125 transitions. [2022-11-23 14:29:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0) internal successors, (144), 48 states have internal predecessors, (144), 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) [2022-11-23 14:29:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18512 states and 25125 transitions. [2022-11-23 14:29:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 14:29:44,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:29:44,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:29:44,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:29:44,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:44,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:29:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:29:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash -522864682, now seen corresponding path program 1 times [2022-11-23 14:29:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:29:44,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291621751] [2022-11-23 14:29:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:29:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:29:51,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:29:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291621751] [2022-11-23 14:29:51,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291621751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:29:51,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430335638] [2022-11-23 14:29:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:29:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:29:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:29:51,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:29:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_331807e2-2beb-4bb8-abbe-c05d9acfe4cb/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:29:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:29:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 14:29:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:30:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:30:02,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:32:38,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430335638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045928189] [2022-11-23 14:32:39,002 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-23 14:32:39,002 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:39,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:39,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:39,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:39,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:39,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:39,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:39,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:32:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:32:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:32:39,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:32:51,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:27,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '247670#(and (= ~__return_6228~0 0) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6163~0) (<= 0 ~mode1~0) (<= 1 ~__return_6067~0) (<= |ULTIMATE.start_main_~main__i2~0#1| 6) (<= 0 ~id1~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_6163~0) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (= ~p3~0 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= ~__return_6067~0 1) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:27,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:27,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:27,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 88 [2022-11-23 14:33:27,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66131175] [2022-11-23 14:33:27,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-23 14:33:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:27,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-23 14:33:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1875, Invalid=14895, Unknown=0, NotChecked=0, Total=16770 [2022-11-23 14:33:27,146 INFO L87 Difference]: Start difference. First operand 18512 states and 25125 transitions. Second operand has 89 states, 89 states have (on average 1.696629213483146) internal successors, (151), 88 states have internal predecessors, (151), 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) [2022-11-23 14:33:35,500 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 591 DAG size of output: 273 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:33:43,261 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 592 DAG size of output: 273 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:33:49,707 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 593 DAG size of output: 253 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:33:56,159 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 599 DAG size of output: 223 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:34:02,803 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 600 DAG size of output: 202 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:35:16,500 WARN L233 SmtUtils]: Spent 13.68s on a formula simplification. DAG size of input: 591 DAG size of output: 516 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)