./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:38:34,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:38:34,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:38:34,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:38:34,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:38:34,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:38:34,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:38:34,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:38:34,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:38:34,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:38:34,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:38:34,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:38:34,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:38:34,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:38:34,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:38:34,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:38:34,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:38:34,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:38:34,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:38:34,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:38:34,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:38:34,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:38:34,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:38:34,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:38:34,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:38:34,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:38:34,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:38:34,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:38:34,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:38:34,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:38:34,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:38:34,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:38:34,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:38:34,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:38:34,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:38:34,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:38:34,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:38:34,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:38:34,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:38:34,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:38:34,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:38:34,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:38:34,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:38:34,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:38:34,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:38:34,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:38:34,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:38:34,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:38:34,974 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:38:34,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:38:34,975 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:38:34,975 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:38:34,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:38:34,977 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:38:34,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:38:34,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:38:34,977 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:38:34,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:38:34,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:38:34,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:38:34,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:38:34,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:38:34,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:38:34,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:38:34,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:38:34,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:38:34,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:38:34,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:38:34,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:38:34,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:38:34,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:38:34,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:38:34,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:38:34,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:38:34,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:38:34,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:38:34,984 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:38:34,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:38:34,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:38:34,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:38:34,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:38:34,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:38:34,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:38:34,987 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2022-11-23 14:38:35,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:38:35,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:38:35,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:38:35,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:38:35,350 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:38:35,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-23 14:38:38,466 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:38:38,752 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:38:38,753 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-23 14:38:38,770 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/data/e255b0f65/f7ea9987a6bb4470bfb571812c96e409/FLAG215dcd5dc [2022-11-23 14:38:38,797 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/data/e255b0f65/f7ea9987a6bb4470bfb571812c96e409 [2022-11-23 14:38:38,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:38:38,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:38:38,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:38:38,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:38:38,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:38:38,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:38" (1/1) ... [2022-11-23 14:38:38,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c43ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:38, skipping insertion in model container [2022-11-23 14:38:38,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:38:38" (1/1) ... [2022-11-23 14:38:38,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:38:38,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:38:39,088 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-23 14:38:39,141 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-23 14:38:39,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:38:39,287 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:38:39,299 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-23 14:38:39,319 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_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-23 14:38:39,373 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:38:39,396 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:38:39,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39 WrapperNode [2022-11-23 14:38:39,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:38:39,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:38:39,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:38:39,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:38:39,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,491 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2022-11-23 14:38:39,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:38:39,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:38:39,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:38:39,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:38:39,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:38:39,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:38:39,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:38:39,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:38:39,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (1/1) ... [2022-11-23 14:38:39,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:38:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:39,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:38:39,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:38:39,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:38:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 14:38:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 14:38:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-23 14:38:39,635 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-23 14:38:39,635 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-23 14:38:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-23 14:38:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-23 14:38:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-23 14:38:39,636 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-23 14:38:39,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-23 14:38:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-23 14:38:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-23 14:38:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-23 14:38:39,637 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-23 14:38:39,637 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-23 14:38:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-23 14:38:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-23 14:38:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-23 14:38:39,638 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-23 14:38:39,638 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-23 14:38:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-23 14:38:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-23 14:38:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:38:39,639 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-23 14:38:39,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-23 14:38:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-23 14:38:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-23 14:38:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:38:39,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:38:39,640 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-23 14:38:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-23 14:38:39,641 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-23 14:38:39,641 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-23 14:38:39,768 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:38:39,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:38:40,885 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:38:41,361 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:38:41,361 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-23 14:38:41,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:41 BoogieIcfgContainer [2022-11-23 14:38:41,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:38:41,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:38:41,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:38:41,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:38:41,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:38:38" (1/3) ... [2022-11-23 14:38:41,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1f1e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:41, skipping insertion in model container [2022-11-23 14:38:41,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:38:39" (2/3) ... [2022-11-23 14:38:41,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c1f1e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:38:41, skipping insertion in model container [2022-11-23 14:38:41,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:38:41" (3/3) ... [2022-11-23 14:38:41,384 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-23 14:38:41,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:38:41,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 14:38:41,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:38:41,482 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;@1dffc832, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:38:41,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 14:38:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 14:38:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:38:41,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:41,500 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] [2022-11-23 14:38:41,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1717664810, now seen corresponding path program 1 times [2022-11-23 14:38:41,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:41,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457875610] [2022-11-23 14:38:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:41,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457875610] [2022-11-23 14:38:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457875610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:41,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:41,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:38:41,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616283507] [2022-11-23 14:38:41,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:41,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:38:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:38:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:38:41,973 INFO L87 Difference]: Start difference. First operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:38:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:42,651 INFO L93 Difference]: Finished difference Result 494 states and 733 transitions. [2022-11-23 14:38:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:38:42,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 14:38:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:42,681 INFO L225 Difference]: With dead ends: 494 [2022-11-23 14:38:42,681 INFO L226 Difference]: Without dead ends: 276 [2022-11-23 14:38:42,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:38:42,690 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 377 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:42,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 548 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:38:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-23 14:38:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2022-11-23 14:38:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 201 states have (on average 1.4328358208955223) internal successors, (288), 206 states have internal predecessors, (288), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-23 14:38:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 376 transitions. [2022-11-23 14:38:42,826 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 376 transitions. Word has length 45 [2022-11-23 14:38:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:42,826 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 376 transitions. [2022-11-23 14:38:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:38:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 376 transitions. [2022-11-23 14:38:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:38:42,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:42,830 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] [2022-11-23 14:38:42,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:38:42,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:42,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1658327863, now seen corresponding path program 1 times [2022-11-23 14:38:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731995079] [2022-11-23 14:38:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:43,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731995079] [2022-11-23 14:38:43,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731995079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:43,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:43,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:38:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18072781] [2022-11-23 14:38:43,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:43,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:38:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:38:43,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:38:43,034 INFO L87 Difference]: Start difference. First operand 269 states and 376 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:38:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:43,895 INFO L93 Difference]: Finished difference Result 671 states and 879 transitions. [2022-11-23 14:38:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:38:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-23 14:38:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:43,902 INFO L225 Difference]: With dead ends: 671 [2022-11-23 14:38:43,902 INFO L226 Difference]: Without dead ends: 539 [2022-11-23 14:38:43,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:38:43,905 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 792 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:43,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1001 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:38:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-23 14:38:43,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 455. [2022-11-23 14:38:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 333 states have (on average 1.3453453453453454) internal successors, (448), 339 states have internal predecessors, (448), 73 states have call successors, (73), 45 states have call predecessors, (73), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2022-11-23 14:38:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 594 transitions. [2022-11-23 14:38:43,991 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 594 transitions. Word has length 45 [2022-11-23 14:38:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:43,992 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 594 transitions. [2022-11-23 14:38:43,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:38:43,993 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 594 transitions. [2022-11-23 14:38:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:38:43,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:43,997 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] [2022-11-23 14:38:43,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:38:43,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1118233714, now seen corresponding path program 1 times [2022-11-23 14:38:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:43,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124029512] [2022-11-23 14:38:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:44,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124029512] [2022-11-23 14:38:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124029512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:44,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:44,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:38:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093652888] [2022-11-23 14:38:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:38:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:38:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:38:44,347 INFO L87 Difference]: Start difference. First operand 455 states and 594 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:38:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:45,271 INFO L93 Difference]: Finished difference Result 971 states and 1210 transitions. [2022-11-23 14:38:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:38:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-23 14:38:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:45,277 INFO L225 Difference]: With dead ends: 971 [2022-11-23 14:38:45,277 INFO L226 Difference]: Without dead ends: 669 [2022-11-23 14:38:45,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:38:45,309 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 451 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:45,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 809 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:38:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-23 14:38:45,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 634. [2022-11-23 14:38:45,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 458 states have (on average 1.3100436681222707) internal successors, (600), 465 states have internal predecessors, (600), 100 states have call successors, (100), 68 states have call predecessors, (100), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-23 14:38:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 804 transitions. [2022-11-23 14:38:45,391 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 804 transitions. Word has length 46 [2022-11-23 14:38:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:45,392 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 804 transitions. [2022-11-23 14:38:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:38:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 804 transitions. [2022-11-23 14:38:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:38:45,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:45,402 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] [2022-11-23 14:38:45,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:38:45,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 377291076, now seen corresponding path program 1 times [2022-11-23 14:38:45,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:45,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128299881] [2022-11-23 14:38:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:45,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:45,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128299881] [2022-11-23 14:38:45,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128299881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:45,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:45,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:38:45,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846874262] [2022-11-23 14:38:45,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:45,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:38:45,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:38:45,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:38:45,531 INFO L87 Difference]: Start difference. First operand 634 states and 804 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:38:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:45,747 INFO L93 Difference]: Finished difference Result 1198 states and 1474 transitions. [2022-11-23 14:38:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:38:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-23 14:38:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:45,753 INFO L225 Difference]: With dead ends: 1198 [2022-11-23 14:38:45,753 INFO L226 Difference]: Without dead ends: 766 [2022-11-23 14:38:45,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:38:45,766 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 67 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:45,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 514 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:38:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-23 14:38:45,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 661. [2022-11-23 14:38:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 481 states have (on average 1.2993762993762994) internal successors, (625), 488 states have internal predecessors, (625), 102 states have call successors, (102), 70 states have call predecessors, (102), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2022-11-23 14:38:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 833 transitions. [2022-11-23 14:38:45,850 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 833 transitions. Word has length 47 [2022-11-23 14:38:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:45,853 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 833 transitions. [2022-11-23 14:38:45,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:38:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 833 transitions. [2022-11-23 14:38:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 14:38:45,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:45,860 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:38:45,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:38:45,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash 871306284, now seen corresponding path program 1 times [2022-11-23 14:38:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:45,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951341592] [2022-11-23 14:38:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:45,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:38:45,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:45,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951341592] [2022-11-23 14:38:45,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951341592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:45,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:45,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:38:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921623545] [2022-11-23 14:38:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:45,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:38:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:38:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:38:45,956 INFO L87 Difference]: Start difference. First operand 661 states and 833 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:38:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:46,138 INFO L93 Difference]: Finished difference Result 851 states and 1054 transitions. [2022-11-23 14:38:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:38:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-23 14:38:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:46,142 INFO L225 Difference]: With dead ends: 851 [2022-11-23 14:38:46,142 INFO L226 Difference]: Without dead ends: 578 [2022-11-23 14:38:46,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:38:46,144 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 282 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:46,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 335 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:38:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-23 14:38:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 469. [2022-11-23 14:38:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 341 states have (on average 1.2991202346041055) internal successors, (443), 346 states have internal predecessors, (443), 78 states have call successors, (78), 50 states have call predecessors, (78), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-23 14:38:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 595 transitions. [2022-11-23 14:38:46,201 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 595 transitions. Word has length 53 [2022-11-23 14:38:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:46,201 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 595 transitions. [2022-11-23 14:38:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:38:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 595 transitions. [2022-11-23 14:38:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:38:46,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:46,203 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:38:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:38:46,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -647770964, now seen corresponding path program 1 times [2022-11-23 14:38:46,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:46,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772548927] [2022-11-23 14:38:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:46,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:46,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772548927] [2022-11-23 14:38:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772548927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:46,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:46,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:38:46,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714472416] [2022-11-23 14:38:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:38:46,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:38:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:38:46,275 INFO L87 Difference]: Start difference. First operand 469 states and 595 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:38:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:46,620 INFO L93 Difference]: Finished difference Result 572 states and 711 transitions. [2022-11-23 14:38:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:38:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-23 14:38:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:46,624 INFO L225 Difference]: With dead ends: 572 [2022-11-23 14:38:46,624 INFO L226 Difference]: Without dead ends: 569 [2022-11-23 14:38:46,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:38:46,626 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 513 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:46,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 311 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:38:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-23 14:38:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 468. [2022-11-23 14:38:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 341 states have (on average 1.2903225806451613) internal successors, (440), 345 states have internal predecessors, (440), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-23 14:38:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 591 transitions. [2022-11-23 14:38:46,711 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 591 transitions. Word has length 54 [2022-11-23 14:38:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:46,712 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 591 transitions. [2022-11-23 14:38:46,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:38:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 591 transitions. [2022-11-23 14:38:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:38:46,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:46,714 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:38:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:38:46,715 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:38:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1392768557, now seen corresponding path program 1 times [2022-11-23 14:38:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944233836] [2022-11-23 14:38:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:46,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944233836] [2022-11-23 14:38:46,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944233836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:38:46,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589171982] [2022-11-23 14:38:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:46,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:38:46,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:46,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:38:46,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:38:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:38:47,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:47,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:38:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589171982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637705821] [2022-11-23 14:38:47,569 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-23 14:38:47,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:38:47,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:38:47,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:38:47,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:38:55,943 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 165 for LOIs [2022-11-23 14:38:55,981 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 133 for LOIs [2022-11-23 14:38:56,000 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 161 for LOIs [2022-11-23 14:38:56,031 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 169 for LOIs [2022-11-23 14:38:56,740 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2022-11-23 14:38:56,849 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 165 for LOIs [2022-11-23 14:38:56,948 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 165 for LOIs [2022-11-23 14:38:56,993 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 172 for LOIs [2022-11-23 14:38:57,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:39:28,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11880#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:39:28,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:39:28,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:39:28,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-23 14:39:28,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044032134] [2022-11-23 14:39:28,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:39:28,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:39:28,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:39:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:39:28,489 INFO L87 Difference]: Start difference. First operand 468 states and 591 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:39:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:29,196 INFO L93 Difference]: Finished difference Result 1041 states and 1246 transitions. [2022-11-23 14:39:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:39:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-23 14:39:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:29,202 INFO L225 Difference]: With dead ends: 1041 [2022-11-23 14:39:29,202 INFO L226 Difference]: Without dead ends: 1038 [2022-11-23 14:39:29,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:39:29,205 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 497 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:29,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1232 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:39:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-23 14:39:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 763. [2022-11-23 14:39:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 546 states have (on average 1.250915750915751) internal successors, (683), 550 states have internal predecessors, (683), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-23 14:39:29,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 930 transitions. [2022-11-23 14:39:29,293 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 930 transitions. Word has length 55 [2022-11-23 14:39:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:29,294 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 930 transitions. [2022-11-23 14:39:29,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:39:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 930 transitions. [2022-11-23 14:39:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:39:29,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:29,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:29,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:39:29,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1225842540, now seen corresponding path program 2 times [2022-11-23 14:39:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:29,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837229593] [2022-11-23 14:39:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:29,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:39:29,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:29,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837229593] [2022-11-23 14:39:29,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837229593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:29,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:39:29,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:39:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281587080] [2022-11-23 14:39:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:29,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:39:29,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:39:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:29,580 INFO L87 Difference]: Start difference. First operand 763 states and 930 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:39:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:29,773 INFO L93 Difference]: Finished difference Result 1176 states and 1403 transitions. [2022-11-23 14:39:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:39:29,774 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-23 14:39:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:29,778 INFO L225 Difference]: With dead ends: 1176 [2022-11-23 14:39:29,778 INFO L226 Difference]: Without dead ends: 765 [2022-11-23 14:39:29,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:29,780 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 285 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:29,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 368 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:39:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-23 14:39:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 759. [2022-11-23 14:39:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 542 states have (on average 1.2380073800738007) internal successors, (671), 546 states have internal predecessors, (671), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-23 14:39:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 918 transitions. [2022-11-23 14:39:29,891 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 918 transitions. Word has length 58 [2022-11-23 14:39:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:29,892 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 918 transitions. [2022-11-23 14:39:29,892 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 14:39:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 918 transitions. [2022-11-23 14:39:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:39:29,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:29,894 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, 1, 1, 1, 1, 1] [2022-11-23 14:39:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:39:29,894 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:29,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1811806047, now seen corresponding path program 1 times [2022-11-23 14:39:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522767688] [2022-11-23 14:39:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:29,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:39:30,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:30,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522767688] [2022-11-23 14:39:30,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522767688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:30,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:39:30,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:39:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621451912] [2022-11-23 14:39:30,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:30,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:39:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:30,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:39:30,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:39:30,008 INFO L87 Difference]: Start difference. First operand 759 states and 918 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:39:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:30,935 INFO L93 Difference]: Finished difference Result 1427 states and 2005 transitions. [2022-11-23 14:39:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:39:30,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-23 14:39:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:30,942 INFO L225 Difference]: With dead ends: 1427 [2022-11-23 14:39:30,942 INFO L226 Difference]: Without dead ends: 1285 [2022-11-23 14:39:30,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:39:30,945 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1083 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:30,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1127 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:39:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-23 14:39:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1272. [2022-11-23 14:39:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 962 states have (on average 1.3544698544698546) internal successors, (1303), 969 states have internal predecessors, (1303), 194 states have call successors, (194), 116 states have call predecessors, (194), 114 states have return successors, (237), 188 states have call predecessors, (237), 191 states have call successors, (237) [2022-11-23 14:39:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1734 transitions. [2022-11-23 14:39:31,122 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1734 transitions. Word has length 56 [2022-11-23 14:39:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:31,123 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1734 transitions. [2022-11-23 14:39:31,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:39:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1734 transitions. [2022-11-23 14:39:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:39:31,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:31,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:31,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:39:31,125 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1279350032, now seen corresponding path program 1 times [2022-11-23 14:39:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:31,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605436572] [2022-11-23 14:39:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:31,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:39:31,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605436572] [2022-11-23 14:39:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605436572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:31,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:39:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:39:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985226699] [2022-11-23 14:39:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:39:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:39:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:31,173 INFO L87 Difference]: Start difference. First operand 1272 states and 1734 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:39:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:31,438 INFO L93 Difference]: Finished difference Result 1891 states and 2444 transitions. [2022-11-23 14:39:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:39:31,439 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-23 14:39:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:31,448 INFO L225 Difference]: With dead ends: 1891 [2022-11-23 14:39:31,448 INFO L226 Difference]: Without dead ends: 1528 [2022-11-23 14:39:31,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:31,451 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 42 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:31,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 550 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:39:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-11-23 14:39:31,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1347. [2022-11-23 14:39:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1030 states have internal predecessors, (1378), 201 states have call successors, (201), 123 states have call predecessors, (201), 121 states have return successors, (244), 195 states have call predecessors, (244), 198 states have call successors, (244) [2022-11-23 14:39:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1823 transitions. [2022-11-23 14:39:31,611 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1823 transitions. Word has length 61 [2022-11-23 14:39:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:31,611 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1823 transitions. [2022-11-23 14:39:31,611 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:39:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1823 transitions. [2022-11-23 14:39:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:39:31,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:31,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:31,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:39:31,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:31,615 INFO L85 PathProgramCache]: Analyzing trace with hash -983373549, now seen corresponding path program 1 times [2022-11-23 14:39:31,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:31,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704369674] [2022-11-23 14:39:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:31,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:39:31,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:31,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704369674] [2022-11-23 14:39:31,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704369674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:31,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:39:31,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:39:31,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395441356] [2022-11-23 14:39:31,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:31,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:39:31,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:39:31,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:39:31,789 INFO L87 Difference]: Start difference. First operand 1347 states and 1823 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:39:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:32,785 INFO L93 Difference]: Finished difference Result 2396 states and 3006 transitions. [2022-11-23 14:39:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:39:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-23 14:39:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:32,795 INFO L225 Difference]: With dead ends: 2396 [2022-11-23 14:39:32,795 INFO L226 Difference]: Without dead ends: 1715 [2022-11-23 14:39:32,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:39:32,798 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 433 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:32,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 918 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:39:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-23 14:39:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1666. [2022-11-23 14:39:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1237 states have (on average 1.3047696038803558) internal successors, (1614), 1244 states have internal predecessors, (1614), 257 states have call successors, (257), 172 states have call predecessors, (257), 170 states have return successors, (300), 251 states have call predecessors, (300), 254 states have call successors, (300) [2022-11-23 14:39:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2171 transitions. [2022-11-23 14:39:33,062 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2171 transitions. Word has length 70 [2022-11-23 14:39:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:33,063 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2171 transitions. [2022-11-23 14:39:33,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 14:39:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2171 transitions. [2022-11-23 14:39:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:39:33,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:33,065 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:33,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:39:33,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:33,066 INFO L85 PathProgramCache]: Analyzing trace with hash -462296564, now seen corresponding path program 1 times [2022-11-23 14:39:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:33,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918606815] [2022-11-23 14:39:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:33,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:39:33,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918606815] [2022-11-23 14:39:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918606815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:33,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:39:33,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:39:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870375268] [2022-11-23 14:39:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:33,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:39:33,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:33,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:39:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:33,120 INFO L87 Difference]: Start difference. First operand 1666 states and 2171 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:39:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:33,468 INFO L93 Difference]: Finished difference Result 2632 states and 3265 transitions. [2022-11-23 14:39:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:39:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-23 14:39:33,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:33,480 INFO L225 Difference]: With dead ends: 2632 [2022-11-23 14:39:33,480 INFO L226 Difference]: Without dead ends: 1842 [2022-11-23 14:39:33,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:39:33,484 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 37 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:33,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 544 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:39:33,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-23 14:39:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1713. [2022-11-23 14:39:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1276 states have (on average 1.3009404388714734) internal successors, (1660), 1283 states have internal predecessors, (1660), 261 states have call successors, (261), 176 states have call predecessors, (261), 174 states have return successors, (304), 255 states have call predecessors, (304), 258 states have call successors, (304) [2022-11-23 14:39:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2225 transitions. [2022-11-23 14:39:33,747 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2225 transitions. Word has length 71 [2022-11-23 14:39:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:33,747 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2225 transitions. [2022-11-23 14:39:33,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:39:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2225 transitions. [2022-11-23 14:39:33,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-23 14:39:33,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:33,750 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:33,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:39:33,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:33,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1326549782, now seen corresponding path program 1 times [2022-11-23 14:39:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:33,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802269141] [2022-11-23 14:39:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:39:34,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802269141] [2022-11-23 14:39:34,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802269141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332465668] [2022-11-23 14:39:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:34,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:34,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:34,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:34,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:39:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:39:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:39:34,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:39:34,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332465668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:34,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:39:34,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-23 14:39:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317016130] [2022-11-23 14:39:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:34,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:39:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:39:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:39:34,403 INFO L87 Difference]: Start difference. First operand 1713 states and 2225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:39:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:34,937 INFO L93 Difference]: Finished difference Result 2577 states and 3230 transitions. [2022-11-23 14:39:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:39:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-23 14:39:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:34,944 INFO L225 Difference]: With dead ends: 2577 [2022-11-23 14:39:34,944 INFO L226 Difference]: Without dead ends: 1530 [2022-11-23 14:39:34,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:39:34,948 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 280 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:34,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1139 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:39:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-23 14:39:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1345. [2022-11-23 14:39:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1039 states have (on average 1.3378248315688162) internal successors, (1390), 1046 states have internal predecessors, (1390), 190 states have call successors, (190), 116 states have call predecessors, (190), 114 states have return successors, (233), 184 states have call predecessors, (233), 187 states have call successors, (233) [2022-11-23 14:39:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1813 transitions. [2022-11-23 14:39:35,136 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1813 transitions. Word has length 102 [2022-11-23 14:39:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:35,136 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1813 transitions. [2022-11-23 14:39:35,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:39:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1813 transitions. [2022-11-23 14:39:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 14:39:35,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:35,140 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:35,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:35,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:35,346 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1978668510, now seen corresponding path program 1 times [2022-11-23 14:39:35,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055528086] [2022-11-23 14:39:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 14:39:35,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:35,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055528086] [2022-11-23 14:39:35,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055528086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:35,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788361222] [2022-11-23 14:39:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:35,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:35,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:35,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:35,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:39:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:39:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:39:35,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:39:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788361222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:35,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:39:35,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 14:39:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109730456] [2022-11-23 14:39:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:35,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:39:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:39:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:39:35,855 INFO L87 Difference]: Start difference. First operand 1345 states and 1813 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:39:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:36,362 INFO L93 Difference]: Finished difference Result 1894 states and 2438 transitions. [2022-11-23 14:39:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:39:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-23 14:39:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:36,368 INFO L225 Difference]: With dead ends: 1894 [2022-11-23 14:39:36,369 INFO L226 Difference]: Without dead ends: 1301 [2022-11-23 14:39:36,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:39:36,371 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 71 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:36,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1451 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:39:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-11-23 14:39:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1209. [2022-11-23 14:39:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 939 states have (on average 1.3556975505857296) internal successors, (1273), 946 states have internal predecessors, (1273), 171 states have call successors, (171), 99 states have call predecessors, (171), 97 states have return successors, (214), 165 states have call predecessors, (214), 168 states have call successors, (214) [2022-11-23 14:39:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1658 transitions. [2022-11-23 14:39:36,527 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1658 transitions. Word has length 112 [2022-11-23 14:39:36,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:36,527 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1658 transitions. [2022-11-23 14:39:36,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-23 14:39:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1658 transitions. [2022-11-23 14:39:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 14:39:36,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:36,530 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:36,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:39:36,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:39:36,739 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -35244330, now seen corresponding path program 1 times [2022-11-23 14:39:36,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:36,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609160310] [2022-11-23 14:39:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:36,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-23 14:39:36,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609160310] [2022-11-23 14:39:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609160310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642278401] [2022-11-23 14:39:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:36,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:36,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:39:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:39:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:39:37,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:39:37,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642278401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:39:37,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:39:37,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-23 14:39:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762023154] [2022-11-23 14:39:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:39:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:39:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:39:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:39:37,177 INFO L87 Difference]: Start difference. First operand 1209 states and 1658 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:39:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:37,606 INFO L93 Difference]: Finished difference Result 1958 states and 2503 transitions. [2022-11-23 14:39:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:39:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-23 14:39:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:37,614 INFO L225 Difference]: With dead ends: 1958 [2022-11-23 14:39:37,614 INFO L226 Difference]: Without dead ends: 1501 [2022-11-23 14:39:37,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:39:37,616 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 265 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:37,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1222 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:39:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-23 14:39:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1467. [2022-11-23 14:39:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1101 states have (on average 1.3197093551316985) internal successors, (1453), 1114 states have internal predecessors, (1453), 219 states have call successors, (219), 141 states have call predecessors, (219), 145 states have return successors, (274), 213 states have call predecessors, (274), 216 states have call successors, (274) [2022-11-23 14:39:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1946 transitions. [2022-11-23 14:39:37,832 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1946 transitions. Word has length 113 [2022-11-23 14:39:37,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:37,833 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1946 transitions. [2022-11-23 14:39:37,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 14:39:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1946 transitions. [2022-11-23 14:39:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 14:39:37,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:37,836 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:37,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:39:38,042 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:39:38,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1194020130, now seen corresponding path program 1 times [2022-11-23 14:39:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983426951] [2022-11-23 14:39:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 14:39:39,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983426951] [2022-11-23 14:39:39,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983426951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189437015] [2022-11-23 14:39:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:39,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:39,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:39:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:39:39,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:39:40,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:39:42,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189437015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:42,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670400612] [2022-11-23 14:39:42,240 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-23 14:39:42,240 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:39:42,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:39:42,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:39:42,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:37,276 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 304 for LOIs [2022-11-23 14:40:38,273 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 256 for LOIs [2022-11-23 14:40:38,359 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 249 for LOIs [2022-11-23 14:40:38,500 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 316 for LOIs [2022-11-23 14:40:41,585 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 184 for LOIs [2022-11-23 14:40:42,084 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 133 for LOIs [2022-11-23 14:40:42,428 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 308 for LOIs [2022-11-23 14:40:43,115 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 331 for LOIs [2022-11-23 14:40:43,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:02,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55049#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (= 0 ~t4_st~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:02,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:02,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:02,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-23 14:42:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809137649] [2022-11-23 14:42:02,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:42:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:42:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=10149, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:42:02,084 INFO L87 Difference]: Start difference. First operand 1467 states and 1946 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:42:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:24,742 INFO L93 Difference]: Finished difference Result 3757 states and 4600 transitions. [2022-11-23 14:42:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-23 14:42:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-23 14:42:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:24,760 INFO L225 Difference]: With dead ends: 3757 [2022-11-23 14:42:24,760 INFO L226 Difference]: Without dead ends: 3042 [2022-11-23 14:42:24,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40846 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-23 14:42:24,780 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 4258 mSDsluCounter, 3437 mSDsCounter, 0 mSdLazyCounter, 8273 mSolverCounterSat, 1993 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 3667 SdHoareTripleChecker+Invalid, 10266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1993 IncrementalHoareTripleChecker+Valid, 8273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:24,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4260 Valid, 3667 Invalid, 10266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1993 Valid, 8273 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-23 14:42:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-23 14:42:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1743. [2022-11-23 14:42:25,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1285 states have (on average 1.2949416342412452) internal successors, (1664), 1300 states have internal predecessors, (1664), 264 states have call successors, (264), 178 states have call predecessors, (264), 192 states have return successors, (331), 266 states have call predecessors, (331), 261 states have call successors, (331) [2022-11-23 14:42:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2259 transitions. [2022-11-23 14:42:25,166 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2259 transitions. Word has length 114 [2022-11-23 14:42:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:25,166 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2259 transitions. [2022-11-23 14:42:25,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-23 14:42:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2259 transitions. [2022-11-23 14:42:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:42:25,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:25,171 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:25,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:25,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1348825369, now seen corresponding path program 1 times [2022-11-23 14:42:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851042657] [2022-11-23 14:42:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:42:25,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851042657] [2022-11-23 14:42:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851042657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439865319] [2022-11-23 14:42:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:25,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:25,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:25,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:42:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:42:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:42:26,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:42:26,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439865319] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:26,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:42:26,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-23 14:42:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112847238] [2022-11-23 14:42:26,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:26,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:42:26,308 INFO L87 Difference]: Start difference. First operand 1743 states and 2259 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:42:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:27,415 INFO L93 Difference]: Finished difference Result 3067 states and 3807 transitions. [2022-11-23 14:42:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:42:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-23 14:42:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:27,425 INFO L225 Difference]: With dead ends: 3067 [2022-11-23 14:42:27,426 INFO L226 Difference]: Without dead ends: 2076 [2022-11-23 14:42:27,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:42:27,429 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 444 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:27,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 531 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:42:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-23 14:42:27,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1823. [2022-11-23 14:42:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1330 states have (on average 1.2894736842105263) internal successors, (1715), 1348 states have internal predecessors, (1715), 283 states have call successors, (283), 187 states have call predecessors, (283), 208 states have return successors, (371), 289 states have call predecessors, (371), 280 states have call successors, (371) [2022-11-23 14:42:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2369 transitions. [2022-11-23 14:42:27,777 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2369 transitions. Word has length 115 [2022-11-23 14:42:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2369 transitions. [2022-11-23 14:42:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:42:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2369 transitions. [2022-11-23 14:42:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:42:27,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:27,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:27,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:27,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:42:27,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1267765248, now seen corresponding path program 1 times [2022-11-23 14:42:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818240974] [2022-11-23 14:42:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:27,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:28,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818240974] [2022-11-23 14:42:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818240974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419993926] [2022-11-23 14:42:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:28,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:28,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:28,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:42:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:42:28,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419993926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:28,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:28,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:42:28,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718776545] [2022-11-23 14:42:28,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:28,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:28,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:28,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:28,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:28,355 INFO L87 Difference]: Start difference. First operand 1823 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:28,847 INFO L93 Difference]: Finished difference Result 3117 states and 4493 transitions. [2022-11-23 14:42:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-23 14:42:28,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:28,859 INFO L225 Difference]: With dead ends: 3117 [2022-11-23 14:42:28,859 INFO L226 Difference]: Without dead ends: 2462 [2022-11-23 14:42:28,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:28,864 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 281 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:28,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-11-23 14:42:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2453. [2022-11-23 14:42:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1848 states have (on average 1.3474025974025974) internal successors, (2490), 1869 states have internal predecessors, (2490), 365 states have call successors, (365), 217 states have call predecessors, (365), 238 states have return successors, (495), 368 states have call predecessors, (495), 362 states have call successors, (495) [2022-11-23 14:42:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3350 transitions. [2022-11-23 14:42:29,299 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3350 transitions. Word has length 109 [2022-11-23 14:42:29,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:29,300 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 3350 transitions. [2022-11-23 14:42:29,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3350 transitions. [2022-11-23 14:42:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:42:29,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:29,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:29,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:42:29,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 365418080, now seen corresponding path program 1 times [2022-11-23 14:42:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817687098] [2022-11-23 14:42:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:29,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:29,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817687098] [2022-11-23 14:42:29,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817687098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:29,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499539954] [2022-11-23 14:42:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:29,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:29,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:42:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:42:29,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:29,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499539954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:29,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:29,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:42:29,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390960657] [2022-11-23 14:42:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:29,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:29,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:29,908 INFO L87 Difference]: Start difference. First operand 2453 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:30,643 INFO L93 Difference]: Finished difference Result 4992 states and 7492 transitions. [2022-11-23 14:42:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-23 14:42:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:30,674 INFO L225 Difference]: With dead ends: 4992 [2022-11-23 14:42:30,674 INFO L226 Difference]: Without dead ends: 3707 [2022-11-23 14:42:30,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:30,683 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 278 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:30,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-11-23 14:42:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3693. [2022-11-23 14:42:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 2869 states have (on average 1.397699546880446) internal successors, (4010), 2896 states have internal predecessors, (4010), 524 states have call successors, (524), 277 states have call predecessors, (524), 298 states have return successors, (734), 521 states have call predecessors, (734), 521 states have call successors, (734) [2022-11-23 14:42:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5268 transitions. [2022-11-23 14:42:31,356 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5268 transitions. Word has length 109 [2022-11-23 14:42:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:31,356 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5268 transitions. [2022-11-23 14:42:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5268 transitions. [2022-11-23 14:42:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:42:31,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:31,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:31,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:31,570 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash 802163712, now seen corresponding path program 1 times [2022-11-23 14:42:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:31,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400597404] [2022-11-23 14:42:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:31,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400597404] [2022-11-23 14:42:31,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400597404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:31,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222481968] [2022-11-23 14:42:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:31,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:31,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:31,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:31,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:42:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:31,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:42:31,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:31,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222481968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:31,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:31,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:42:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731342843] [2022-11-23 14:42:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:31,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:31,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:31,992 INFO L87 Difference]: Start difference. First operand 3693 states and 5268 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:32,934 INFO L93 Difference]: Finished difference Result 8682 states and 13349 transitions. [2022-11-23 14:42:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:32,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-23 14:42:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:32,967 INFO L225 Difference]: With dead ends: 8682 [2022-11-23 14:42:32,967 INFO L226 Difference]: Without dead ends: 6157 [2022-11-23 14:42:32,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:32,981 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 266 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:32,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6157 states. [2022-11-23 14:42:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6157 to 6133. [2022-11-23 14:42:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 4881 states have (on average 1.4320835894283959) internal successors, (6990), 4920 states have internal predecessors, (6990), 832 states have call successors, (832), 397 states have call predecessors, (832), 418 states have return successors, (1194), 817 states have call predecessors, (1194), 829 states have call successors, (1194) [2022-11-23 14:42:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9016 transitions. [2022-11-23 14:42:33,963 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9016 transitions. Word has length 109 [2022-11-23 14:42:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:33,963 INFO L495 AbstractCegarLoop]: Abstraction has 6133 states and 9016 transitions. [2022-11-23 14:42:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9016 transitions. [2022-11-23 14:42:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:42:33,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:33,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:33,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:34,179 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1497608608, now seen corresponding path program 1 times [2022-11-23 14:42:34,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:34,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209806248] [2022-11-23 14:42:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:42:34,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:34,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209806248] [2022-11-23 14:42:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209806248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:34,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706629024] [2022-11-23 14:42:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:34,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:34,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:42:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:34,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:42:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:42:34,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:42:34,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706629024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:34,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:42:34,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 14:42:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256468961] [2022-11-23 14:42:34,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:34,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:34,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:34,584 INFO L87 Difference]: Start difference. First operand 6133 states and 9016 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:36,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:36,067 INFO L93 Difference]: Finished difference Result 15942 states and 24781 transitions. [2022-11-23 14:42:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-23 14:42:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:36,124 INFO L225 Difference]: With dead ends: 15942 [2022-11-23 14:42:36,124 INFO L226 Difference]: Without dead ends: 10977 [2022-11-23 14:42:36,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:42:36,151 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:36,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2022-11-23 14:42:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10933. [2022-11-23 14:42:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10933 states, 8845 states have (on average 1.4505370265686828) internal successors, (12830), 8908 states have internal predecessors, (12830), 1428 states have call successors, (1428), 637 states have call predecessors, (1428), 658 states have return successors, (2078), 1389 states have call predecessors, (2078), 1425 states have call successors, (2078) [2022-11-23 14:42:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 16336 transitions. [2022-11-23 14:42:37,749 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 16336 transitions. Word has length 109 [2022-11-23 14:42:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:37,750 INFO L495 AbstractCegarLoop]: Abstraction has 10933 states and 16336 transitions. [2022-11-23 14:42:37,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 14:42:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 16336 transitions. [2022-11-23 14:42:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 14:42:37,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:37,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:37,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:37,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 14:42:37,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -728981696, now seen corresponding path program 1 times [2022-11-23 14:42:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:37,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944312680] [2022-11-23 14:42:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:37,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 14:42:38,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:38,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944312680] [2022-11-23 14:42:38,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944312680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:38,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:38,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395528416] [2022-11-23 14:42:38,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:38,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:38,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:38,055 INFO L87 Difference]: Start difference. First operand 10933 states and 16336 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:40,591 INFO L93 Difference]: Finished difference Result 20985 states and 32499 transitions. [2022-11-23 14:42:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:40,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-23 14:42:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:40,670 INFO L225 Difference]: With dead ends: 20985 [2022-11-23 14:42:40,671 INFO L226 Difference]: Without dead ends: 13141 [2022-11-23 14:42:40,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:40,708 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 92 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 615 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-11-23 14:42:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 12357. [2022-11-23 14:42:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12357 states, 10205 states have (on average 1.487702106810387) internal successors, (15182), 10268 states have internal predecessors, (15182), 1460 states have call successors, (1460), 669 states have call predecessors, (1460), 690 states have return successors, (2110), 1421 states have call predecessors, (2110), 1457 states have call successors, (2110) [2022-11-23 14:42:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 18752 transitions. [2022-11-23 14:42:42,373 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 18752 transitions. Word has length 109 [2022-11-23 14:42:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:42,374 INFO L495 AbstractCegarLoop]: Abstraction has 12357 states and 18752 transitions. [2022-11-23 14:42:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 14:42:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 18752 transitions. [2022-11-23 14:42:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 14:42:42,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:42,389 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:42,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 14:42:42,390 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1755810669, now seen corresponding path program 1 times [2022-11-23 14:42:42,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:42,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001670139] [2022-11-23 14:42:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:42,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:42:43,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001670139] [2022-11-23 14:42:43,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001670139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:42:43,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176213620] [2022-11-23 14:42:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:43,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:43,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:43,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:42:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:43,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 14:42:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:42:44,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:42:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176213620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595251337] [2022-11-23 14:42:46,329 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-23 14:42:46,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:46,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:46,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:46,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:21,044 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 239 for LOIs [2022-11-23 14:43:21,183 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 240 for LOIs [2022-11-23 14:43:21,278 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 239 for LOIs [2022-11-23 14:43:21,368 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 239 for LOIs [2022-11-23 14:43:22,610 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 239 for LOIs [2022-11-23 14:43:23,115 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 120 for LOIs [2022-11-23 14:43:23,473 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 243 for LOIs [2022-11-23 14:43:23,590 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-23 14:43:23,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:35,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200600#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:35,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:35,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:35,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-23 14:44:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199071258] [2022-11-23 14:44:35,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:35,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:44:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:35,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:44:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=9127, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 14:44:35,818 INFO L87 Difference]: Start difference. First operand 12357 states and 18752 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:44:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:46,851 INFO L93 Difference]: Finished difference Result 15206 states and 22094 transitions. [2022-11-23 14:44:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 14:44:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-23 14:44:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:46,905 INFO L225 Difference]: With dead ends: 15206 [2022-11-23 14:44:46,905 INFO L226 Difference]: Without dead ends: 14135 [2022-11-23 14:44:46,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14312 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=3540, Invalid=29766, Unknown=0, NotChecked=0, Total=33306 [2022-11-23 14:44:46,917 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4657 mSDsluCounter, 2024 mSDsCounter, 0 mSdLazyCounter, 4714 mSolverCounterSat, 2485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4658 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 7199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2485 IncrementalHoareTripleChecker+Valid, 4714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:46,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4658 Valid, 2229 Invalid, 7199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2485 Valid, 4714 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-23 14:44:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14135 states. [2022-11-23 14:44:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14135 to 12894. [2022-11-23 14:44:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12894 states, 10591 states have (on average 1.4758757435558494) internal successors, (15631), 10654 states have internal predecessors, (15631), 1534 states have call successors, (1534), 728 states have call predecessors, (1534), 767 states have return successors, (2202), 1513 states have call predecessors, (2202), 1531 states have call successors, (2202) [2022-11-23 14:44:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12894 states to 12894 states and 19367 transitions. [2022-11-23 14:44:48,738 INFO L78 Accepts]: Start accepts. Automaton has 12894 states and 19367 transitions. Word has length 124 [2022-11-23 14:44:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:48,739 INFO L495 AbstractCegarLoop]: Abstraction has 12894 states and 19367 transitions. [2022-11-23 14:44:48,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-23 14:44:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 12894 states and 19367 transitions. [2022-11-23 14:44:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:44:48,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:48,758 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:48,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:44:48,965 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1032292256, now seen corresponding path program 1 times [2022-11-23 14:44:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455627543] [2022-11-23 14:44:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 14:44:49,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455627543] [2022-11-23 14:44:49,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455627543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:49,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579562597] [2022-11-23 14:44:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:49,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:49,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:49,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:44:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:49,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:44:49,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:44:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:44:49,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579562597] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:49,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:44:49,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-23 14:44:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462589117] [2022-11-23 14:44:49,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:49,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:44:49,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:44:49,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:44:49,736 INFO L87 Difference]: Start difference. First operand 12894 states and 19367 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:44:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:52,448 INFO L93 Difference]: Finished difference Result 13853 states and 20458 transitions. [2022-11-23 14:44:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:44:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-23 14:44:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:52,491 INFO L225 Difference]: With dead ends: 13853 [2022-11-23 14:44:52,492 INFO L226 Difference]: Without dead ends: 12245 [2022-11-23 14:44:52,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:44:52,499 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 664 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:52,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 505 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:44:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12245 states. [2022-11-23 14:44:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 11904. [2022-11-23 14:44:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 9894 states have (on average 1.4967657165959167) internal successors, (14809), 9956 states have internal predecessors, (14809), 1384 states have call successors, (1384), 607 states have call predecessors, (1384), 624 states have return successors, (2019), 1342 states have call predecessors, (2019), 1381 states have call successors, (2019) [2022-11-23 14:44:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 18212 transitions. [2022-11-23 14:44:54,235 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 18212 transitions. Word has length 125 [2022-11-23 14:44:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:54,235 INFO L495 AbstractCegarLoop]: Abstraction has 11904 states and 18212 transitions. [2022-11-23 14:44:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-23 14:44:54,235 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 18212 transitions. [2022-11-23 14:44:54,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:44:54,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:54,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:54,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:54,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4b3b6c4-71a9-47b8-a33f-66ded01a111f/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:54,471 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:44:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:54,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2100535398, now seen corresponding path program 1 times [2022-11-23 14:44:54,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:54,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442336954] [2022-11-23 14:44:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:54,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:44:54,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442336954] [2022-11-23 14:44:54,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442336954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:44:54,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:44:54,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:44:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565327567] [2022-11-23 14:44:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:44:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:44:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:44:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:54,572 INFO L87 Difference]: Start difference. First operand 11904 states and 18212 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:44:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:58,480 INFO L93 Difference]: Finished difference Result 33929 states and 53565 transitions. [2022-11-23 14:44:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:44:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-23 14:44:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:58,600 INFO L225 Difference]: With dead ends: 33929 [2022-11-23 14:44:58,601 INFO L226 Difference]: Without dead ends: 22740 [2022-11-23 14:44:58,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:44:58,656 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 272 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:58,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:44:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22740 states. [2022-11-23 14:45:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22740 to 22624. [2022-11-23 14:45:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22624 states, 18918 states have (on average 1.4966169785389576) internal successors, (28313), 19028 states have internal predecessors, (28313), 2568 states have call successors, (2568), 1119 states have call predecessors, (2568), 1136 states have return successors, (3747), 2478 states have call predecessors, (3747), 2565 states have call successors, (3747) [2022-11-23 14:45:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22624 states to 22624 states and 34628 transitions. [2022-11-23 14:45:02,512 INFO L78 Accepts]: Start accepts. Automaton has 22624 states and 34628 transitions. Word has length 147 [2022-11-23 14:45:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:02,513 INFO L495 AbstractCegarLoop]: Abstraction has 22624 states and 34628 transitions. [2022-11-23 14:45:02,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:45:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22624 states and 34628 transitions. [2022-11-23 14:45:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 14:45:02,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:02,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:02,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 14:45:02,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash -558126527, now seen corresponding path program 1 times [2022-11-23 14:45:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583688560] [2022-11-23 14:45:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-23 14:45:02,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583688560] [2022-11-23 14:45:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583688560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:02,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:02,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:45:02,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540791714] [2022-11-23 14:45:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:02,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:45:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:45:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:45:02,706 INFO L87 Difference]: Start difference. First operand 22624 states and 34628 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)