./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9 --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 d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 --- 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-6b4ec56 [2022-11-20 20:10:56,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:10:56,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:10:56,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:10:56,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:10:56,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:10:56,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:10:56,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:10:56,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:10:56,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:10:56,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:10:56,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:10:56,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:10:56,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:10:56,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:10:56,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:10:56,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:10:56,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:10:56,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:10:56,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:10:56,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:10:56,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:10:56,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:10:56,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:10:56,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:10:56,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:10:56,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:10:56,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:10:56,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:10:56,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:10:56,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:10:56,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:10:56,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:10:56,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:10:56,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:10:56,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:10:56,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:10:56,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:10:56,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:10:56,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:10:56,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:10:56,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:10:56,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:10:56,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:10:56,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:10:56,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:10:56,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:10:56,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:10:56,649 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:10:56,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:10:56,649 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:10:56,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:10:56,650 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:10:56,650 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:10:56,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:10:56,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:10:56,651 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:10:56,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:10:56,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:10:56,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:10:56,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:10:56,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:10:56,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:10:56,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:10:56,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:10:56,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:10:56,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:10:56,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:10:56,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:10:56,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:10:56,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:10:56,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:10:56,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:10:56,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:10:56,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:10:56,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:10:56,656 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:10:56,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:10:56,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:10:56,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:10:56,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:10:56,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:10:56,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:10:56,658 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_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 [2022-11-20 20:10:56,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:10:56,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:10:56,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:10:56,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:10:56,961 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:10:56,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/systemc/token_ring.15.cil.c [2022-11-20 20:11:00,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:11:00,326 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:11:00,327 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/sv-benchmarks/c/systemc/token_ring.15.cil.c [2022-11-20 20:11:00,341 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/data/cefe442f1/37d08e1a26e0464b820ccc2c9154f26d/FLAG89a6f112d [2022-11-20 20:11:00,355 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/data/cefe442f1/37d08e1a26e0464b820ccc2c9154f26d [2022-11-20 20:11:00,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:11:00,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:11:00,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:11:00,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:11:00,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:11:00,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:00,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65c01658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00, skipping insertion in model container [2022-11-20 20:11:00,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:00,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:11:00,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:11:00,572 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_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2022-11-20 20:11:00,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:11:00,800 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:11:00,828 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_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2022-11-20 20:11:00,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:11:00,955 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:11:00,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00 WrapperNode [2022-11-20 20:11:00,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:11:00,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:11:00,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:11:00,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:11:00,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:00,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,020 INFO L138 Inliner]: procedures = 54, calls = 71, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 914 [2022-11-20 20:11:01,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:11:01,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:11:01,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:11:01,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:11:01,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:11:01,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:11:01,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:11:01,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:11:01,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (1/1) ... [2022-11-20 20:11:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:11:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:01,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:11:01,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:11:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:11:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-20 20:11:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-20 20:11:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 20:11:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 20:11:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-20 20:11:01,233 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-20 20:11:01,233 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-20 20:11:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-20 20:11:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-20 20:11:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-20 20:11:01,234 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-20 20:11:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-20 20:11:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-20 20:11:01,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-20 20:11:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:11:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:11:01,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:11:01,458 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:11:01,461 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:11:02,572 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:11:03,060 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:11:03,060 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 20:11:03,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:11:03 BoogieIcfgContainer [2022-11-20 20:11:03,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:11:03,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:11:03,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:11:03,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:11:03,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:11:00" (1/3) ... [2022-11-20 20:11:03,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e972b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:11:03, skipping insertion in model container [2022-11-20 20:11:03,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:11:00" (2/3) ... [2022-11-20 20:11:03,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e972b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:11:03, skipping insertion in model container [2022-11-20 20:11:03,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:11:03" (3/3) ... [2022-11-20 20:11:03,072 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.15.cil.c [2022-11-20 20:11:03,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:11:03,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:11:03,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:11:03,150 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;@2d18560b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:11:03,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:11:03,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 167 states have (on average 1.5688622754491017) internal successors, (262), 171 states have internal predecessors, (262), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-20 20:11:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 20:11:03,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:03,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:11:03,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash 801565801, now seen corresponding path program 1 times [2022-11-20 20:11:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:03,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011418046] [2022-11-20 20:11:03,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:11:03,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011418046] [2022-11-20 20:11:03,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011418046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:03,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:11:03,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:11:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513128340] [2022-11-20 20:11:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:03,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:11:03,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:11:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:11:03,775 INFO L87 Difference]: Start difference. First operand has 205 states, 167 states have (on average 1.5688622754491017) internal successors, (262), 171 states have internal predecessors, (262), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-11-20 20:11:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:04,445 INFO L93 Difference]: Finished difference Result 592 states and 943 transitions. [2022-11-20 20:11:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:11:04,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 70 [2022-11-20 20:11:04,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:04,470 INFO L225 Difference]: With dead ends: 592 [2022-11-20 20:11:04,470 INFO L226 Difference]: Without dead ends: 388 [2022-11-20 20:11:04,480 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 [2022-11-20 20:11:04,486 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 553 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:04,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 880 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:11:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-20 20:11:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 387. [2022-11-20 20:11:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 322 states have (on average 1.5341614906832297) internal successors, (494), 325 states have internal predecessors, (494), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-20 20:11:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 596 transitions. [2022-11-20 20:11:04,564 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 596 transitions. Word has length 70 [2022-11-20 20:11:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:04,565 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 596 transitions. [2022-11-20 20:11:04,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-11-20 20:11:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 596 transitions. [2022-11-20 20:11:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:04,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:04,574 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, 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] [2022-11-20 20:11:04,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:11:04,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:04,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1706203696, now seen corresponding path program 1 times [2022-11-20 20:11:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:04,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421340693] [2022-11-20 20:11:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:04,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:11:04,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421340693] [2022-11-20 20:11:04,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421340693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:04,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003731283] [2022-11-20 20:11:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:04,899 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:04,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:11:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 20:11:05,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:05,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003731283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:05,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:05,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 20:11:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227133944] [2022-11-20 20:11:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:05,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:05,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:05,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:05,383 INFO L87 Difference]: Start difference. First operand 387 states and 596 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-11-20 20:11:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:05,631 INFO L93 Difference]: Finished difference Result 1144 states and 1793 transitions. [2022-11-20 20:11:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:05,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 143 [2022-11-20 20:11:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:05,640 INFO L225 Difference]: With dead ends: 1144 [2022-11-20 20:11:05,641 INFO L226 Difference]: Without dead ends: 762 [2022-11-20 20:11:05,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:05,644 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 285 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:05,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 570 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:11:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-20 20:11:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 756. [2022-11-20 20:11:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 635 states have (on average 1.5322834645669292) internal successors, (973), 639 states have internal predecessors, (973), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-20 20:11:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1163 transitions. [2022-11-20 20:11:05,740 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1163 transitions. Word has length 143 [2022-11-20 20:11:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:05,741 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1163 transitions. [2022-11-20 20:11:05,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2022-11-20 20:11:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1163 transitions. [2022-11-20 20:11:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:05,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:05,759 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, 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] [2022-11-20 20:11:05,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:11:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:05,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash -278678802, now seen corresponding path program 1 times [2022-11-20 20:11:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:05,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315313452] [2022-11-20 20:11:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:05,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:11:06,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:06,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315313452] [2022-11-20 20:11:06,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315313452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:06,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645035065] [2022-11-20 20:11:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:06,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:06,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:06,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:11:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:11:06,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:06,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645035065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:06,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:06,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 20:11:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503123243] [2022-11-20 20:11:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:06,593 INFO L87 Difference]: Start difference. First operand 756 states and 1163 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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) [2022-11-20 20:11:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:06,834 INFO L93 Difference]: Finished difference Result 2245 states and 3514 transitions. [2022-11-20 20:11:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 143 [2022-11-20 20:11:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:06,846 INFO L225 Difference]: With dead ends: 2245 [2022-11-20 20:11:06,846 INFO L226 Difference]: Without dead ends: 1494 [2022-11-20 20:11:06,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:06,852 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 261 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:06,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:11:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-20 20:11:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1486. [2022-11-20 20:11:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1255 states have (on average 1.5290836653386455) internal successors, (1919), 1261 states have internal predecessors, (1919), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-20 20:11:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2281 transitions. [2022-11-20 20:11:06,955 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2281 transitions. Word has length 143 [2022-11-20 20:11:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:06,956 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2281 transitions. [2022-11-20 20:11:06,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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) [2022-11-20 20:11:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2281 transitions. [2022-11-20 20:11:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:06,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:06,963 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, 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] [2022-11-20 20:11:06,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:07,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash -881744468, now seen corresponding path program 1 times [2022-11-20 20:11:07,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:07,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673706265] [2022-11-20 20:11:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:11:07,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673706265] [2022-11-20 20:11:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673706265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388247570] [2022-11-20 20:11:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:07,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:07,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:07,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:11:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 20:11:07,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:07,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388247570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:07,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:07,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 20:11:07,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028461462] [2022-11-20 20:11:07,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:07,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:07,684 INFO L87 Difference]: Start difference. First operand 1486 states and 2281 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-11-20 20:11:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:07,942 INFO L93 Difference]: Finished difference Result 4423 states and 6906 transitions. [2022-11-20 20:11:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:07,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 143 [2022-11-20 20:11:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:07,958 INFO L225 Difference]: With dead ends: 4423 [2022-11-20 20:11:07,959 INFO L226 Difference]: Without dead ends: 2942 [2022-11-20 20:11:07,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:07,966 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 288 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:07,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:11:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-11-20 20:11:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2930. [2022-11-20 20:11:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2930 states, 2483 states have (on average 1.5251711639146195) internal successors, (3787), 2493 states have internal predecessors, (3787), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-20 20:11:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4485 transitions. [2022-11-20 20:11:08,163 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4485 transitions. Word has length 143 [2022-11-20 20:11:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:08,164 INFO L495 AbstractCegarLoop]: Abstraction has 2930 states and 4485 transitions. [2022-11-20 20:11:08,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-11-20 20:11:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4485 transitions. [2022-11-20 20:11:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:08,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:08,172 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, 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] [2022-11-20 20:11:08,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:08,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:08,379 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash 593488942, now seen corresponding path program 1 times [2022-11-20 20:11:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487417071] [2022-11-20 20:11:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:11:08,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487417071] [2022-11-20 20:11:08,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487417071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:08,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917600640] [2022-11-20 20:11:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:08,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:08,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:08,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:11:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:11:08,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:08,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917600640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:08,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:08,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 20:11:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009244958] [2022-11-20 20:11:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:08,908 INFO L87 Difference]: Start difference. First operand 2930 states and 4485 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2022-11-20 20:11:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:09,353 INFO L93 Difference]: Finished difference Result 8731 states and 13590 transitions. [2022-11-20 20:11:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:09,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 143 [2022-11-20 20:11:09,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:09,391 INFO L225 Difference]: With dead ends: 8731 [2022-11-20 20:11:09,391 INFO L226 Difference]: Without dead ends: 5806 [2022-11-20 20:11:09,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:09,406 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 267 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:09,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:11:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-11-20 20:11:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5786. [2022-11-20 20:11:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 4915 states have (on average 1.520854526958291) internal successors, (7475), 4933 states have internal predecessors, (7475), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-20 20:11:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 8829 transitions. [2022-11-20 20:11:09,725 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 8829 transitions. Word has length 143 [2022-11-20 20:11:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:09,725 INFO L495 AbstractCegarLoop]: Abstraction has 5786 states and 8829 transitions. [2022-11-20 20:11:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2022-11-20 20:11:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 8829 transitions. [2022-11-20 20:11:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:09,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:09,739 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, 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] [2022-11-20 20:11:09,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:09,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:09,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -393193364, now seen corresponding path program 1 times [2022-11-20 20:11:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406680218] [2022-11-20 20:11:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:11:10,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406680218] [2022-11-20 20:11:10,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406680218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263712608] [2022-11-20 20:11:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:10,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:10,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:10,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:11:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:10,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:11:10,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:10,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263712608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:10,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:10,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-20 20:11:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360446460] [2022-11-20 20:11:10,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:10,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:11:10,460 INFO L87 Difference]: Start difference. First operand 5786 states and 8829 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2022-11-20 20:11:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:11,035 INFO L93 Difference]: Finished difference Result 17251 states and 26758 transitions. [2022-11-20 20:11:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 143 [2022-11-20 20:11:11,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:11,096 INFO L225 Difference]: With dead ends: 17251 [2022-11-20 20:11:11,096 INFO L226 Difference]: Without dead ends: 11470 [2022-11-20 20:11:11,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:11:11,119 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 279 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:11,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:11:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2022-11-20 20:11:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 11434. [2022-11-20 20:11:11,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11434 states, 9731 states have (on average 1.51628815126914) internal successors, (14755), 9765 states have internal predecessors, (14755), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-20 20:11:11,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11434 states to 11434 states and 17389 transitions. [2022-11-20 20:11:11,917 INFO L78 Accepts]: Start accepts. Automaton has 11434 states and 17389 transitions. Word has length 143 [2022-11-20 20:11:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:11,918 INFO L495 AbstractCegarLoop]: Abstraction has 11434 states and 17389 transitions. [2022-11-20 20:11:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2022-11-20 20:11:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 11434 states and 17389 transitions. [2022-11-20 20:11:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:11,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:11,943 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, 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] [2022-11-20 20:11:11,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:12,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 20:11:12,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1882871722, now seen corresponding path program 1 times [2022-11-20 20:11:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:12,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383528854] [2022-11-20 20:11:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:11:12,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383528854] [2022-11-20 20:11:12,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383528854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:12,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46256544] [2022-11-20 20:11:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:12,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:12,290 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:12,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:11:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:11:12,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:12,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46256544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:12,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-20 20:11:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105605036] [2022-11-20 20:11:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:12,648 INFO L87 Difference]: Start difference. First operand 11434 states and 17389 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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) [2022-11-20 20:11:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:13,724 INFO L93 Difference]: Finished difference Result 34099 states and 52694 transitions. [2022-11-20 20:11:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:13,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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 143 [2022-11-20 20:11:13,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:13,836 INFO L225 Difference]: With dead ends: 34099 [2022-11-20 20:11:13,836 INFO L226 Difference]: Without dead ends: 22670 [2022-11-20 20:11:13,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:11:13,875 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 258 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:13,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:11:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22670 states. [2022-11-20 20:11:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22670 to 22602. [2022-11-20 20:11:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22602 states, 19267 states have (on average 1.5115482431099807) internal successors, (29123), 19333 states have internal predecessors, (29123), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-20 20:11:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22602 states to 22602 states and 34253 transitions. [2022-11-20 20:11:15,323 INFO L78 Accepts]: Start accepts. Automaton has 22602 states and 34253 transitions. Word has length 143 [2022-11-20 20:11:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:15,325 INFO L495 AbstractCegarLoop]: Abstraction has 22602 states and 34253 transitions. [2022-11-20 20:11:15,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 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) [2022-11-20 20:11:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 22602 states and 34253 transitions. [2022-11-20 20:11:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:15,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:15,366 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, 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] [2022-11-20 20:11:15,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:15,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1146719660, now seen corresponding path program 1 times [2022-11-20 20:11:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029082954] [2022-11-20 20:11:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 20:11:15,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029082954] [2022-11-20 20:11:15,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029082954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:11:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902484323] [2022-11-20 20:11:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:15,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:15,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:11:15,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:11:15,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:11:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:16,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:11:16,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:11:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 20:11:16,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:11:16,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902484323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:16,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:11:16,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-20 20:11:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767966018] [2022-11-20 20:11:16,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:16,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:11:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:11:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:11:16,077 INFO L87 Difference]: Start difference. First operand 22602 states and 34253 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-11-20 20:11:18,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:18,238 INFO L93 Difference]: Finished difference Result 67411 states and 103766 transitions. [2022-11-20 20:11:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:11:18,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 143 [2022-11-20 20:11:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:18,473 INFO L225 Difference]: With dead ends: 67411 [2022-11-20 20:11:18,474 INFO L226 Difference]: Without dead ends: 44814 [2022-11-20 20:11:18,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:11:18,566 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 273 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:18,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 529 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:11:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44814 states. [2022-11-20 20:11:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44814 to 44682. [2022-11-20 20:11:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44682 states, 38147 states have (on average 1.5066715600178258) internal successors, (57475), 38277 states have internal predecessors, (57475), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-20 20:11:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44682 states to 44682 states and 67469 transitions. [2022-11-20 20:11:21,276 INFO L78 Accepts]: Start accepts. Automaton has 44682 states and 67469 transitions. Word has length 143 [2022-11-20 20:11:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:21,277 INFO L495 AbstractCegarLoop]: Abstraction has 44682 states and 67469 transitions. [2022-11-20 20:11:21,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2022-11-20 20:11:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 44682 states and 67469 transitions. [2022-11-20 20:11:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 20:11:21,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:21,349 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, 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] [2022-11-20 20:11:21,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:11:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bfa1e1-ccf3-4617-aab6-b33a44ac12fc/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:11:21,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1447777130, now seen corresponding path program 1 times [2022-11-20 20:11:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894969065] [2022-11-20 20:11:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 20:11:22,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:22,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894969065] [2022-11-20 20:11:22,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894969065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:22,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:11:22,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:11:22,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891929254] [2022-11-20 20:11:22,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:22,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:11:22,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:22,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:11:22,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:11:22,531 INFO L87 Difference]: Start difference. First operand 44682 states and 67469 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 20:11:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:27,884 INFO L93 Difference]: Finished difference Result 156818 states and 236308 transitions. [2022-11-20 20:11:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:11:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-20 20:11:27,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:28,591 INFO L225 Difference]: With dead ends: 156818 [2022-11-20 20:11:28,591 INFO L226 Difference]: Without dead ends: 112142 [2022-11-20 20:11:28,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:11:28,718 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1166 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:28,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 946 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:11:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112142 states. [2022-11-20 20:11:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112142 to 87818. [2022-11-20 20:11:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 75011 states have (on average 1.5016864193251656) internal successors, (112643), 75269 states have internal predecessors, (112643), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-20 20:11:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 132109 transitions. [2022-11-20 20:11:33,984 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 132109 transitions. Word has length 143 [2022-11-20 20:11:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:11:33,986 INFO L495 AbstractCegarLoop]: Abstraction has 87818 states and 132109 transitions. [2022-11-20 20:11:33,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 20:11:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 132109 transitions. [2022-11-20 20:11:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-20 20:11:34,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:11:34,151 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, 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] [2022-11-20 20:11:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:11:34,151 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:11:34,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:11:34,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1418472926, now seen corresponding path program 1 times [2022-11-20 20:11:34,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:11:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548884254] [2022-11-20 20:11:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:11:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:11:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:11:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 20:11:35,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:11:35,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548884254] [2022-11-20 20:11:35,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548884254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:11:35,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:11:35,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:11:35,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612546612] [2022-11-20 20:11:35,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:11:35,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:11:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:11:35,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:11:35,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:11:35,202 INFO L87 Difference]: Start difference. First operand 87818 states and 132109 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 20:11:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:11:43,335 INFO L93 Difference]: Finished difference Result 241042 states and 362899 transitions. [2022-11-20 20:11:43,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:11:43,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-20 20:11:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:11:44,166 INFO L225 Difference]: With dead ends: 241042 [2022-11-20 20:11:44,166 INFO L226 Difference]: Without dead ends: 153230 [2022-11-20 20:11:44,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:11:44,400 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1029 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:11:44,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1042 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:11:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153230 states.