./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh --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 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f --- 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-2329fc7 [2022-12-14 09:13:19,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:13:19,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:13:19,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:13:19,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:13:19,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:13:19,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:13:19,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:13:19,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:13:19,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:13:19,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:13:19,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:13:19,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:13:19,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:13:19,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:13:19,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:13:19,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:13:19,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:13:19,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:13:19,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:13:19,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:13:19,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:13:19,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:13:19,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:13:19,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:13:19,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:13:19,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:13:19,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:13:19,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:13:19,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:13:19,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:13:19,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:13:19,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:13:19,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:13:19,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:13:19,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:13:19,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:13:19,779 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:13:19,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:13:19,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:13:19,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:13:19,781 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:13:19,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:13:19,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:13:19,803 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:13:19,803 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:13:19,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:13:19,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:13:19,804 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:13:19,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:13:19,804 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:13:19,805 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:13:19,805 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:13:19,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:13:19,805 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:13:19,805 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:13:19,806 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:13:19,806 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:13:19,806 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:13:19,806 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:13:19,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:13:19,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:13:19,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:13:19,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:13:19,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:13:19,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:13:19,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:13:19,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:13:19,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:13:19,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:19,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:13:19,809 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:13:19,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:13:19,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:13:19,810 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:13:19,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:13:19,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:13:19,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:13:19,810 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_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16d5feefc85136540ef4669433de80b700c3a57c51c2b65f22ef098d8e79a29f [2022-12-14 09:13:19,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:13:20,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:13:20,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:13:20,020 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:13:20,020 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:13:20,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 09:13:22,598 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:13:22,783 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:13:22,784 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 09:13:22,792 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/data/b35ac2463/73f4a48c3b22498cb4236e1c9da955f2/FLAGc81417d95 [2022-12-14 09:13:23,169 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/data/b35ac2463/73f4a48c3b22498cb4236e1c9da955f2 [2022-12-14 09:13:23,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:13:23,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:13:23,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:23,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:13:23,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:13:23,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d31bf77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23, skipping insertion in model container [2022-12-14 09:13:23,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:13:23,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:13:23,353 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_0f4a50a5-53cc-4900-a34c-556c04b1deef/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-12-14 09:13:23,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:23,382 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:13:23,407 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_0f4a50a5-53cc-4900-a34c-556c04b1deef/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2022-12-14 09:13:23,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:23,433 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:13:23,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23 WrapperNode [2022-12-14 09:13:23,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:23,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:23,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:13:23,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:13:23,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,467 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 423 [2022-12-14 09:13:23,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:23,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:13:23,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:13:23,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:13:23,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:13:23,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:13:23,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:13:23,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:13:23,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (1/1) ... [2022-12-14 09:13:23,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:23,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:13:23,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:13:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:13:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:13:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:13:23,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:13:23,629 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:13:23,631 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:13:23,934 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:13:24,021 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:13:24,021 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 09:13:24,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:24 BoogieIcfgContainer [2022-12-14 09:13:24,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:13:24,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:13:24,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:13:24,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:13:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:13:23" (1/3) ... [2022-12-14 09:13:24,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719af4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:24, skipping insertion in model container [2022-12-14 09:13:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:23" (2/3) ... [2022-12-14 09:13:24,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719af4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:24, skipping insertion in model container [2022-12-14 09:13:24,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:24" (3/3) ... [2022-12-14 09:13:24,029 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 09:13:24,043 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:13:24,044 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:13:24,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:13:24,089 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;@3fa0e9f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:13:24,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:13:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 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) [2022-12-14 09:13:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 09:13:24,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:24,099 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] [2022-12-14 09:13:24,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2023666919, now seen corresponding path program 1 times [2022-12-14 09:13:24,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:24,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042905348] [2022-12-14 09:13:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:24,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:24,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:24,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042905348] [2022-12-14 09:13:24,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042905348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:24,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:24,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664692323] [2022-12-14 09:13:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:24,362 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 09:13:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:24,436 INFO L93 Difference]: Finished difference Result 189 states and 292 transitions. [2022-12-14 09:13:24,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2022-12-14 09:13:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:24,444 INFO L225 Difference]: With dead ends: 189 [2022-12-14 09:13:24,445 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 09:13:24,447 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 [2022-12-14 09:13:24,449 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 101 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:24,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 259 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 09:13:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 09:13:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 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) [2022-12-14 09:13:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2022-12-14 09:13:24,483 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2022-12-14 09:13:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:24,483 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2022-12-14 09:13:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2022-12-14 09:13:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2022-12-14 09:13:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:13:24,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:24,484 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, 1, 1] [2022-12-14 09:13:24,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:13:24,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1640261836, now seen corresponding path program 1 times [2022-12-14 09:13:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883984429] [2022-12-14 09:13:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:24,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:24,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883984429] [2022-12-14 09:13:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883984429] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357191265] [2022-12-14 09:13:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:24,565 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-14 09:13:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:24,631 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2022-12-14 09:13:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-12-14 09:13:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:24,633 INFO L225 Difference]: With dead ends: 301 [2022-12-14 09:13:24,633 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 09:13:24,634 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 [2022-12-14 09:13:24,634 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:24,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 09:13:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-12-14 09:13:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 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) [2022-12-14 09:13:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2022-12-14 09:13:24,655 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2022-12-14 09:13:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:24,655 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2022-12-14 09:13:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-12-14 09:13:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2022-12-14 09:13:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:13:24,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:24,656 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, 1, 1, 1, 1, 1] [2022-12-14 09:13:24,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:13:24,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash 2012514755, now seen corresponding path program 1 times [2022-12-14 09:13:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:24,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832385411] [2022-12-14 09:13:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:24,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:24,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:24,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832385411] [2022-12-14 09:13:24,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832385411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:24,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:24,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:24,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942001936] [2022-12-14 09:13:24,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:24,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:24,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:24,717 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-12-14 09:13:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:24,777 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2022-12-14 09:13:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2022-12-14 09:13:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:24,780 INFO L225 Difference]: With dead ends: 504 [2022-12-14 09:13:24,780 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 09:13:24,781 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 [2022-12-14 09:13:24,781 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:24,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 09:13:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-12-14 09:13:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 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) [2022-12-14 09:13:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2022-12-14 09:13:24,825 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2022-12-14 09:13:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:24,825 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2022-12-14 09:13:24,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2022-12-14 09:13:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2022-12-14 09:13:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 09:13:24,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:24,827 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:24,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:13:24,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash 125802477, now seen corresponding path program 1 times [2022-12-14 09:13:24,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:24,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487740444] [2022-12-14 09:13:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:24,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487740444] [2022-12-14 09:13:24,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487740444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:24,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:24,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673061993] [2022-12-14 09:13:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:24,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:24,881 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-12-14 09:13:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:24,961 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2022-12-14 09:13:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 [2022-12-14 09:13:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:24,963 INFO L225 Difference]: With dead ends: 844 [2022-12-14 09:13:24,963 INFO L226 Difference]: Without dead ends: 542 [2022-12-14 09:13:24,964 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 [2022-12-14 09:13:24,965 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:24,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:13:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-12-14 09:13:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-12-14 09:13:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 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) [2022-12-14 09:13:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2022-12-14 09:13:25,013 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2022-12-14 09:13:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:25,014 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2022-12-14 09:13:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-12-14 09:13:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2022-12-14 09:13:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:13:25,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:25,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:13:25,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1177829407, now seen corresponding path program 1 times [2022-12-14 09:13:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053201311] [2022-12-14 09:13:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:25,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053201311] [2022-12-14 09:13:25,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053201311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:25,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:25,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:13:25,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047268978] [2022-12-14 09:13:25,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:25,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:13:25,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:25,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:13:25,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:13:25,143 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-12-14 09:13:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:25,496 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2022-12-14 09:13:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:13:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 [2022-12-14 09:13:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:25,503 INFO L225 Difference]: With dead ends: 2244 [2022-12-14 09:13:25,504 INFO L226 Difference]: Without dead ends: 1730 [2022-12-14 09:13:25,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:13:25,506 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 283 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:25,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 395 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-12-14 09:13:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2022-12-14 09:13:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 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) [2022-12-14 09:13:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2022-12-14 09:13:25,718 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2022-12-14 09:13:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:25,718 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2022-12-14 09:13:25,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-12-14 09:13:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2022-12-14 09:13:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:13:25,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:25,719 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:13:25,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1105029325, now seen corresponding path program 1 times [2022-12-14 09:13:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29342565] [2022-12-14 09:13:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:25,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:26,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:26,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29342565] [2022-12-14 09:13:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29342565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:26,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:26,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:13:26,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079731093] [2022-12-14 09:13:26,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:13:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:13:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:13:26,011 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2022-12-14 09:13:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:26,675 INFO L93 Difference]: Finished difference Result 4370 states and 6402 transitions. [2022-12-14 09:13:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:13:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 51 [2022-12-14 09:13:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:26,685 INFO L225 Difference]: With dead ends: 4370 [2022-12-14 09:13:26,686 INFO L226 Difference]: Without dead ends: 4368 [2022-12-14 09:13:26,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:13:26,687 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 909 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:26,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2022-12-14 09:13:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 1973. [2022-12-14 09:13:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.4447261663286004) internal successors, (2849), 1972 states have internal predecessors, (2849), 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) [2022-12-14 09:13:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2849 transitions. [2022-12-14 09:13:26,937 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2849 transitions. Word has length 51 [2022-12-14 09:13:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:26,938 INFO L495 AbstractCegarLoop]: Abstraction has 1973 states and 2849 transitions. [2022-12-14 09:13:26,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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) [2022-12-14 09:13:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2849 transitions. [2022-12-14 09:13:26,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:13:26,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:26,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:13:26,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:13:26,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:26,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1961993484, now seen corresponding path program 1 times [2022-12-14 09:13:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:26,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212832348] [2022-12-14 09:13:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:27,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212832348] [2022-12-14 09:13:27,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212832348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433190904] [2022-12-14 09:13:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:27,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:27,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:13:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 09:13:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:29,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:36,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433190904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:13:36,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126181175] [2022-12-14 09:13:36,425 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 09:13:36,426 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:13:36,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:13:36,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:13:36,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:13:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:36,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 09:13:36,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:36,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:36,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:36,551 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 15 treesize of output 21 [2022-12-14 09:13:56,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:21,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21714#(and (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (= ~__return_19276~0 |ULTIMATE.start_main_~check__tmp~0#1|) (= ~__return_19276~0 |ULTIMATE.start_main_~main__c1~0#1|) (= ~p3_new~0 ~nomsg~0) (or (and (<= 0 ~p4~0) (<= ~send3~0 127) (<= ~p3~0 0) (<= 0 ~id3~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 1 ~__return_19141~0) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~p4~0 0) (<= ~mode1~0 1) (<= |#NULL.base| 0) (<= ~st4~0 0) (<= 0 ~id4~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= (+ ~p2_old~0 1) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|)) (and (<= 0 ~p4~0) (<= ~send3~0 127) (<= ~p3~0 0) (<= 0 ~id3~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (<= 0 |#NULL.base|) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= ~__return_19141~0 1) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 1 ~__return_19141~0) (<= 1 ~mode4~0) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~p3~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~p4~0 0) (<= ~mode1~0 1) (<= |#NULL.base| 0) (<= ~st4~0 0) (<= 0 ~id4~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= (+ ~p2_old~0 1) 0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|))) (= ~nomsg~0 ~p2_new~0) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (= (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) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))))' at error location [2022-12-14 09:14:21,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:21,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:21,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-12-14 09:14:21,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124801354] [2022-12-14 09:14:21,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:21,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 09:14:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 09:14:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 09:14:21,289 INFO L87 Difference]: Start difference. First operand 1973 states and 2849 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2022-12-14 09:16:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:05,051 INFO L93 Difference]: Finished difference Result 47178 states and 68760 transitions. [2022-12-14 09:16:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-12-14 09:16:05,051 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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 61 [2022-12-14 09:16:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:05,155 INFO L225 Difference]: With dead ends: 47178 [2022-12-14 09:16:05,155 INFO L226 Difference]: Without dead ends: 45259 [2022-12-14 09:16:05,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81261 ImplicationChecksByTransitivity, 99.4s TimeCoverageRelationStatistics Valid=27124, Invalid=150538, Unknown=0, NotChecked=0, Total=177662 [2022-12-14 09:16:05,186 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 12497 mSDsluCounter, 6896 mSDsCounter, 0 mSdLazyCounter, 10107 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12497 SdHoareTripleChecker+Valid, 7139 SdHoareTripleChecker+Invalid, 10739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 10107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12497 Valid, 7139 Invalid, 10739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [632 Valid, 10107 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-12-14 09:16:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45259 states. [2022-12-14 09:16:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45259 to 15420. [2022-12-14 09:16:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15420 states, 15419 states have (on average 1.4206498475906348) internal successors, (21905), 15419 states have internal predecessors, (21905), 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) [2022-12-14 09:16:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15420 states to 15420 states and 21905 transitions. [2022-12-14 09:16:11,224 INFO L78 Accepts]: Start accepts. Automaton has 15420 states and 21905 transitions. Word has length 61 [2022-12-14 09:16:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:11,224 INFO L495 AbstractCegarLoop]: Abstraction has 15420 states and 21905 transitions. [2022-12-14 09:16:11,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2022-12-14 09:16:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15420 states and 21905 transitions. [2022-12-14 09:16:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:16:11,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:11,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:11,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:16:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:11,428 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash -431881859, now seen corresponding path program 1 times [2022-12-14 09:16:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:11,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485636294] [2022-12-14 09:16:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:16:11,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:11,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485636294] [2022-12-14 09:16:11,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485636294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:11,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:11,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:16:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979200936] [2022-12-14 09:16:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:11,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:16:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:16:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:16:11,524 INFO L87 Difference]: Start difference. First operand 15420 states and 21905 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-12-14 09:16:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:19,718 INFO L93 Difference]: Finished difference Result 37559 states and 53633 transitions. [2022-12-14 09:16:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:16:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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 61 [2022-12-14 09:16:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:19,745 INFO L225 Difference]: With dead ends: 37559 [2022-12-14 09:16:19,745 INFO L226 Difference]: Without dead ends: 22295 [2022-12-14 09:16:19,756 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 [2022-12-14 09:16:19,757 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 433 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:19,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 118 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22295 states. [2022-12-14 09:16:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22295 to 22293. [2022-12-14 09:16:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22293 states, 22292 states have (on average 1.4175937556073928) internal successors, (31601), 22292 states have internal predecessors, (31601), 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) [2022-12-14 09:16:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22293 states to 22293 states and 31601 transitions. [2022-12-14 09:16:27,660 INFO L78 Accepts]: Start accepts. Automaton has 22293 states and 31601 transitions. Word has length 61 [2022-12-14 09:16:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:27,660 INFO L495 AbstractCegarLoop]: Abstraction has 22293 states and 31601 transitions. [2022-12-14 09:16:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-12-14 09:16:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22293 states and 31601 transitions. [2022-12-14 09:16:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:16:27,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:27,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:16:27,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash -296120648, now seen corresponding path program 1 times [2022-12-14 09:16:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:27,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192221146] [2022-12-14 09:16:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:28,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:28,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192221146] [2022-12-14 09:16:28,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192221146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:28,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932995355] [2022-12-14 09:16:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:28,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:28,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:28,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:16:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 09:16:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:29,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:16:38,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932995355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:38,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321180158] [2022-12-14 09:16:38,306 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 09:16:38,306 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:38,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:38,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:38,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:38,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:38,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:38,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:38,370 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 15 treesize of output 21 [2022-12-14 09:16:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:38,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 09:16:46,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:17:06,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '219626#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (= ~p4~0 0) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (= ~__return_19276~0 |ULTIMATE.start_main_~check__tmp~0#1|) (= ~__return_19276~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~send1~0 127) (<= ~st1~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~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) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 09:17:06,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:17:06,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:17:06,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 47 [2022-12-14 09:17:06,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126062004] [2022-12-14 09:17:06,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:17:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 09:17:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:17:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 09:17:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1267, Invalid=7663, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 09:17:06,341 INFO L87 Difference]: Start difference. First operand 22293 states and 31601 transitions. Second operand has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2022-12-14 09:20:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:20:16,010 INFO L93 Difference]: Finished difference Result 227232 states and 324543 transitions. [2022-12-14 09:20:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 391 states. [2022-12-14 09:20:16,010 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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 61 [2022-12-14 09:20:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:20:16,416 INFO L225 Difference]: With dead ends: 227232 [2022-12-14 09:20:16,416 INFO L226 Difference]: Without dead ends: 204973 [2022-12-14 09:20:16,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106424 ImplicationChecksByTransitivity, 111.6s TimeCoverageRelationStatistics Valid=34272, Invalid=196608, Unknown=0, NotChecked=0, Total=230880 [2022-12-14 09:20:16,489 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 14042 mSDsluCounter, 6665 mSDsCounter, 0 mSdLazyCounter, 10187 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14042 SdHoareTripleChecker+Valid, 6996 SdHoareTripleChecker+Invalid, 10856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 10187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:20:16,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14042 Valid, 6996 Invalid, 10856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [669 Valid, 10187 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-12-14 09:20:16,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204973 states. [2022-12-14 09:20:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204973 to 100056. [2022-12-14 09:20:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100056 states, 100055 states have (on average 1.412982859427315) internal successors, (141376), 100055 states have internal predecessors, (141376), 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) [2022-12-14 09:20:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100056 states to 100056 states and 141376 transitions. [2022-12-14 09:20:58,441 INFO L78 Accepts]: Start accepts. Automaton has 100056 states and 141376 transitions. Word has length 61 [2022-12-14 09:20:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:20:58,441 INFO L495 AbstractCegarLoop]: Abstraction has 100056 states and 141376 transitions. [2022-12-14 09:20:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.8297872340425534) internal successors, (180), 47 states have internal predecessors, (180), 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) [2022-12-14 09:20:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 100056 states and 141376 transitions. [2022-12-14 09:20:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 09:20:58,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:20:58,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:20:58,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:20:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:20:58,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:20:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:20:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1571506049, now seen corresponding path program 1 times [2022-12-14 09:20:58,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:20:58,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394923257] [2022-12-14 09:20:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:20:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:20:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:20:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:20:58,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:20:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394923257] [2022-12-14 09:20:58,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394923257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:20:58,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:20:58,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:20:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597809251] [2022-12-14 09:20:58,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:20:58,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:20:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:20:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:20:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:20:58,712 INFO L87 Difference]: Start difference. First operand 100056 states and 141376 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-12-14 09:21:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:21:52,827 INFO L93 Difference]: Finished difference Result 230143 states and 326626 transitions. [2022-12-14 09:21:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:21:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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 63 [2022-12-14 09:21:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:21:53,054 INFO L225 Difference]: With dead ends: 230143 [2022-12-14 09:21:53,054 INFO L226 Difference]: Without dead ends: 131383 [2022-12-14 09:21:53,120 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 [2022-12-14 09:21:53,121 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 412 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:21:53,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 126 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:21:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131383 states. [2022-12-14 09:22:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131383 to 131381. [2022-12-14 09:22:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 1.4038438118435075) internal successors, (184437), 131380 states have internal predecessors, (184437), 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) [2022-12-14 09:22:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 184437 transitions. [2022-12-14 09:22:47,569 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 184437 transitions. Word has length 63 [2022-12-14 09:22:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:47,569 INFO L495 AbstractCegarLoop]: Abstraction has 131381 states and 184437 transitions. [2022-12-14 09:22:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-12-14 09:22:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 184437 transitions. [2022-12-14 09:22:47,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 09:22:47,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:47,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:22:47,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 605626726, now seen corresponding path program 1 times [2022-12-14 09:22:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769267553] [2022-12-14 09:22:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:47,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:48,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:48,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769267553] [2022-12-14 09:22:48,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769267553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:48,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178013138] [2022-12-14 09:22:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:48,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:48,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f4a50a5-53cc-4900-a34c-556c04b1deef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:22:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 09:22:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:49,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:57,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178013138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1076143322] [2022-12-14 09:22:57,376 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 09:22:57,377 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:57,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:57,377 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:57,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:57,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:57,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:57,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:57,434 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 15 treesize of output 21 [2022-12-14 09:22:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:57,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 09:23:07,792 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:23:28,480 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1318026#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (= ~p4~0 0) (<= ~__return_19141~0 1) (<= 0 ~mode4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 1 ~__return_19141~0) (= ~p2~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (= ~__return_19276~0 |ULTIMATE.start_main_~check__tmp~0#1|) (= ~__return_19276~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~send1~0 127) (<= ~st1~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~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 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 0 ~id4~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~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) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 09:23:28,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:23:28,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:23:28,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-12-14 09:23:28,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002756342] [2022-12-14 09:23:28,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:23:28,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:23:28,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:23:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:23:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=8782, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 09:23:28,482 INFO L87 Difference]: Start difference. First operand 131381 states and 184437 transitions. Second operand has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 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)