./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI --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 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 --- 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-5e519f3 [2022-11-03 01:48:42,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:48:42,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:48:42,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:48:42,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:48:42,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:48:42,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:48:42,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:48:42,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:48:42,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:48:42,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:48:42,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:48:42,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:48:42,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:48:42,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:48:42,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:48:42,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:48:42,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:48:42,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:48:42,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:48:42,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:48:42,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:48:42,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:48:42,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:48:42,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:48:42,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:48:42,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:48:42,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:48:42,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:48:42,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:48:42,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:48:42,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:48:42,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:48:42,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:48:42,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:48:42,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:48:42,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:48:42,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:48:42,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:48:42,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:48:42,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:48:42,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:48:42,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:48:42,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:48:42,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:48:42,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:48:42,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:48:42,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:48:42,171 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:48:42,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:48:42,171 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:48:42,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:48:42,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:48:42,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:48:42,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:48:42,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:48:42,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:48:42,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:48:42,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:48:42,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:48:42,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:48:42,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:48:42,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:48:42,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:48:42,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:48:42,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:48:42,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:48:42,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:48:42,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:48:42,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:48:42,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:48:42,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:48:42,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:48:42,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:48:42,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:42,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:48:42,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:48:42,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:48:42,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:48:42,177 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:48:42,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:48:42,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:48:42,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:48:42,178 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_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 [2022-11-03 01:48:42,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:48:42,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:48:42,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:48:42,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:48:42,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:48:42,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-03 01:48:42,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/data/179181b26/bc62485488e9492eb673e8fef1d65d48/FLAG509d28121 [2022-11-03 01:48:43,211 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:48:43,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-03 01:48:43,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/data/179181b26/bc62485488e9492eb673e8fef1d65d48/FLAG509d28121 [2022-11-03 01:48:43,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/data/179181b26/bc62485488e9492eb673e8fef1d65d48 [2022-11-03 01:48:43,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:48:43,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:48:43,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:43,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:48:43,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:48:43,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:43,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75723638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43, skipping insertion in model container [2022-11-03 01:48:43,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:43,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:48:43,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:48:43,742 WARN L230 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_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-03 01:48:43,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:43,842 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:48:43,867 WARN L230 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_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-03 01:48:43,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:48:43,970 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:48:43,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43 WrapperNode [2022-11-03 01:48:43,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:48:43,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:43,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:48:43,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:48:43,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,078 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 331 [2022-11-03 01:48:44,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:48:44,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:48:44,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:48:44,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:48:44,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,111 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:48:44,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:48:44,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:48:44,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:48:44,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (1/1) ... [2022-11-03 01:48:44,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:48:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:44,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:48:44,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:48:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:48:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:48:44,224 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:48:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:48:44,225 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:48:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:48:44,225 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:48:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:48:44,225 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:48:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:48:44,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:48:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:48:44,226 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:48:44,226 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:48:44,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:48:44,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:48:44,324 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:48:44,327 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:48:44,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:48:45,114 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:48:45,115 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 01:48:45,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:45 BoogieIcfgContainer [2022-11-03 01:48:45,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:48:45,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:48:45,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:48:45,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:48:45,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:48:43" (1/3) ... [2022-11-03 01:48:45,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26141ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:45, skipping insertion in model container [2022-11-03 01:48:45,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:48:43" (2/3) ... [2022-11-03 01:48:45,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26141ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:48:45, skipping insertion in model container [2022-11-03 01:48:45,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:48:45" (3/3) ... [2022-11-03 01:48:45,154 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2022-11-03 01:48:45,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:48:45,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:48:45,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:48:45,299 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;@70d12887, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:48:45,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:48:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 01:48:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:48:45,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:45,315 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] [2022-11-03 01:48:45,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash 988164258, now seen corresponding path program 1 times [2022-11-03 01:48:45,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:45,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972322950] [2022-11-03 01:48:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:45,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:45,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972322950] [2022-11-03 01:48:45,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972322950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:45,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:45,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:48:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293276801] [2022-11-03 01:48:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:48:45,903 INFO L87 Difference]: Start difference. First operand has 89 states, 64 states have (on average 1.5) internal successors, (96), 66 states have internal predecessors, (96), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:48:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:46,360 INFO L93 Difference]: Finished difference Result 251 states and 373 transitions. [2022-11-03 01:48:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:48:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-11-03 01:48:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:46,382 INFO L225 Difference]: With dead ends: 251 [2022-11-03 01:48:46,383 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 01:48:46,388 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 [2022-11-03 01:48:46,391 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 215 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:46,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 306 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:48:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 01:48:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-11-03 01:48:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.411764705882353) internal successors, (168), 121 states have internal predecessors, (168), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 01:48:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 228 transitions. [2022-11-03 01:48:46,453 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 228 transitions. Word has length 39 [2022-11-03 01:48:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:46,453 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 228 transitions. [2022-11-03 01:48:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:48:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 228 transitions. [2022-11-03 01:48:46,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:48:46,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:46,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:48:46,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:46,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash 39532403, now seen corresponding path program 1 times [2022-11-03 01:48:46,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:46,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878009601] [2022-11-03 01:48:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:48:46,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878009601] [2022-11-03 01:48:46,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878009601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:46,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365765140] [2022-11-03 01:48:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:46,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:46,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:46,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:46,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:48:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:46,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:48:46,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365765140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:46,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-03 01:48:46,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604848014] [2022-11-03 01:48:46,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:46,838 INFO L87 Difference]: Start difference. First operand 162 states and 228 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:48:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:46,938 INFO L93 Difference]: Finished difference Result 469 states and 669 transitions. [2022-11-03 01:48:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-03 01:48:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:46,944 INFO L225 Difference]: With dead ends: 469 [2022-11-03 01:48:46,944 INFO L226 Difference]: Without dead ends: 312 [2022-11-03 01:48:46,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:48:46,947 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 100 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:46,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 226 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-03 01:48:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 308. [2022-11-03 01:48:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 229 states have (on average 1.4017467248908297) internal successors, (321), 232 states have internal predecessors, (321), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-03 01:48:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 429 transitions. [2022-11-03 01:48:46,987 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 429 transitions. Word has length 72 [2022-11-03 01:48:46,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:46,987 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 429 transitions. [2022-11-03 01:48:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:48:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 429 transitions. [2022-11-03 01:48:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:48:46,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:46,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:47,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 01:48:47,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash 686067441, now seen corresponding path program 1 times [2022-11-03 01:48:47,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:47,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694352690] [2022-11-03 01:48:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:47,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:48:47,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:47,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694352690] [2022-11-03 01:48:47,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694352690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:47,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056890009] [2022-11-03 01:48:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:47,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:47,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:47,385 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:47,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:48:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:47,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:48:47,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056890009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:47,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:47,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:48:47,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606676119] [2022-11-03 01:48:47,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:47,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:47,606 INFO L87 Difference]: Start difference. First operand 308 states and 429 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:48:47,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:47,738 INFO L93 Difference]: Finished difference Result 901 states and 1272 transitions. [2022-11-03 01:48:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:47,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-11-03 01:48:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:47,743 INFO L225 Difference]: With dead ends: 901 [2022-11-03 01:48:47,743 INFO L226 Difference]: Without dead ends: 598 [2022-11-03 01:48:47,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:47,750 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 97 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:47,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 225 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-03 01:48:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 592. [2022-11-03 01:48:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 443 states have (on average 1.3882618510158014) internal successors, (615), 448 states have internal predecessors, (615), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-03 01:48:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 815 transitions. [2022-11-03 01:48:47,813 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 815 transitions. Word has length 72 [2022-11-03 01:48:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:47,813 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 815 transitions. [2022-11-03 01:48:47,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:48:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 815 transitions. [2022-11-03 01:48:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 01:48:47,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:47,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:47,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:48,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:48,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1192269875, now seen corresponding path program 1 times [2022-11-03 01:48:48,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:48,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899738112] [2022-11-03 01:48:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:48:48,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899738112] [2022-11-03 01:48:48,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899738112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:48,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:48,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:48:48,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245862409] [2022-11-03 01:48:48,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:48,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:48,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:48,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:48,493 INFO L87 Difference]: Start difference. First operand 592 states and 815 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:48,908 INFO L93 Difference]: Finished difference Result 1876 states and 2586 transitions. [2022-11-03 01:48:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:48:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 72 [2022-11-03 01:48:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:48,917 INFO L225 Difference]: With dead ends: 1876 [2022-11-03 01:48:48,918 INFO L226 Difference]: Without dead ends: 1290 [2022-11-03 01:48:48,920 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 [2022-11-03 01:48:48,921 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 321 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:48,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 341 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-03 01:48:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1128. [2022-11-03 01:48:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 843 states have (on average 1.3701067615658362) internal successors, (1155), 852 states have internal predecessors, (1155), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-03 01:48:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1531 transitions. [2022-11-03 01:48:49,026 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1531 transitions. Word has length 72 [2022-11-03 01:48:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:49,026 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1531 transitions. [2022-11-03 01:48:49,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1531 transitions. [2022-11-03 01:48:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 01:48:49,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:49,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:48:49,032 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:49,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1395425187, now seen corresponding path program 1 times [2022-11-03 01:48:49,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:49,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738325117] [2022-11-03 01:48:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:49,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:48:49,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:49,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738325117] [2022-11-03 01:48:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738325117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:49,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:49,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:48:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441521417] [2022-11-03 01:48:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:49,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:49,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:49,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:49,458 INFO L87 Difference]: Start difference. First operand 1128 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:50,020 INFO L93 Difference]: Finished difference Result 2884 states and 3933 transitions. [2022-11-03 01:48:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:48:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-03 01:48:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:50,032 INFO L225 Difference]: With dead ends: 2884 [2022-11-03 01:48:50,032 INFO L226 Difference]: Without dead ends: 1762 [2022-11-03 01:48:50,036 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 [2022-11-03 01:48:50,036 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 294 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:50,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 329 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:48:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-03 01:48:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1656. [2022-11-03 01:48:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1235 states have (on average 1.3562753036437247) internal successors, (1675), 1248 states have internal predecessors, (1675), 276 states have call successors, (276), 144 states have call predecessors, (276), 144 states have return successors, (276), 264 states have call predecessors, (276), 276 states have call successors, (276) [2022-11-03 01:48:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2227 transitions. [2022-11-03 01:48:50,241 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2227 transitions. Word has length 73 [2022-11-03 01:48:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2227 transitions. [2022-11-03 01:48:50,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:48:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2227 transitions. [2022-11-03 01:48:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 01:48:50,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:50,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:48:50,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 362479671, now seen corresponding path program 1 times [2022-11-03 01:48:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:50,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140522644] [2022-11-03 01:48:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:50,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:48:50,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140522644] [2022-11-03 01:48:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140522644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:50,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:50,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:50,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445278464] [2022-11-03 01:48:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:50,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:50,360 INFO L87 Difference]: Start difference. First operand 1656 states and 2227 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:48:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:50,633 INFO L93 Difference]: Finished difference Result 2914 states and 3962 transitions. [2022-11-03 01:48:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-11-03 01:48:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:50,644 INFO L225 Difference]: With dead ends: 2914 [2022-11-03 01:48:50,645 INFO L226 Difference]: Without dead ends: 2064 [2022-11-03 01:48:50,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:50,655 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 45 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:50,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 255 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2022-11-03 01:48:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1870. [2022-11-03 01:48:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1425 states have (on average 1.3803508771929824) internal successors, (1967), 1438 states have internal predecessors, (1967), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-03 01:48:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2543 transitions. [2022-11-03 01:48:50,864 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2543 transitions. Word has length 74 [2022-11-03 01:48:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:50,865 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2543 transitions. [2022-11-03 01:48:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:48:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2543 transitions. [2022-11-03 01:48:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 01:48:50,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:50,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:48:50,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1643608469, now seen corresponding path program 1 times [2022-11-03 01:48:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361484500] [2022-11-03 01:48:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 01:48:50,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:50,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361484500] [2022-11-03 01:48:50,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361484500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:50,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:50,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:48:50,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220367393] [2022-11-03 01:48:50,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:50,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:50,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:50,981 INFO L87 Difference]: Start difference. First operand 1870 states and 2543 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:48:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:51,323 INFO L93 Difference]: Finished difference Result 4662 states and 6380 transitions. [2022-11-03 01:48:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-03 01:48:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:51,336 INFO L225 Difference]: With dead ends: 4662 [2022-11-03 01:48:51,337 INFO L226 Difference]: Without dead ends: 2797 [2022-11-03 01:48:51,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:51,342 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 93 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:51,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 226 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-03 01:48:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2777. [2022-11-03 01:48:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2118 states have (on average 1.3640226628895185) internal successors, (2889), 2137 states have internal predecessors, (2889), 424 states have call successors, (424), 234 states have call predecessors, (424), 234 states have return successors, (424), 406 states have call predecessors, (424), 424 states have call successors, (424) [2022-11-03 01:48:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3737 transitions. [2022-11-03 01:48:51,658 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3737 transitions. Word has length 96 [2022-11-03 01:48:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:51,659 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3737 transitions. [2022-11-03 01:48:51,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:48:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3737 transitions. [2022-11-03 01:48:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:48:51,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:51,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:48:51,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash -779664507, now seen corresponding path program 1 times [2022-11-03 01:48:51,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:51,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845949231] [2022-11-03 01:48:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:51,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:48:51,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:51,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845949231] [2022-11-03 01:48:51,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845949231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:51,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421876420] [2022-11-03 01:48:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:51,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:51,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:51,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:48:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:51,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:52,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:52,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421876420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:52,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:52,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:48:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682606250] [2022-11-03 01:48:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:52,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:52,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:52,021 INFO L87 Difference]: Start difference. First operand 2777 states and 3737 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:48:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:52,319 INFO L93 Difference]: Finished difference Result 5252 states and 7137 transitions. [2022-11-03 01:48:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-03 01:48:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:52,339 INFO L225 Difference]: With dead ends: 5252 [2022-11-03 01:48:52,339 INFO L226 Difference]: Without dead ends: 3400 [2022-11-03 01:48:52,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:52,346 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 60 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 266 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-03 01:48:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3068. [2022-11-03 01:48:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 2373 states have (on average 1.381795195954488) internal successors, (3279), 2392 states have internal predecessors, (3279), 442 states have call successors, (442), 252 states have call predecessors, (442), 252 states have return successors, (442), 424 states have call predecessors, (442), 442 states have call successors, (442) [2022-11-03 01:48:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4163 transitions. [2022-11-03 01:48:52,607 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4163 transitions. Word has length 111 [2022-11-03 01:48:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:52,608 INFO L495 AbstractCegarLoop]: Abstraction has 3068 states and 4163 transitions. [2022-11-03 01:48:52,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:48:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4163 transitions. [2022-11-03 01:48:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 01:48:52,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:52,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:52,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:52,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:52,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1152981882, now seen corresponding path program 2 times [2022-11-03 01:48:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:52,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852225143] [2022-11-03 01:48:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:52,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:48:53,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852225143] [2022-11-03 01:48:53,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852225143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:53,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048646951] [2022-11-03 01:48:53,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:48:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:53,146 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:53,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:48:53,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:48:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 01:48:53,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 01:48:53,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:48:54,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048646951] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:54,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:48:54,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-03 01:48:54,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183020088] [2022-11-03 01:48:54,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:54,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:48:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:48:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:48:54,404 INFO L87 Difference]: Start difference. First operand 3068 states and 4163 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 01:48:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:55,331 INFO L93 Difference]: Finished difference Result 7527 states and 10177 transitions. [2022-11-03 01:48:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:48:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 111 [2022-11-03 01:48:55,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:55,355 INFO L225 Difference]: With dead ends: 7527 [2022-11-03 01:48:55,355 INFO L226 Difference]: Without dead ends: 4465 [2022-11-03 01:48:55,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:48:55,364 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 313 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:55,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 241 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:48:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2022-11-03 01:48:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 4463. [2022-11-03 01:48:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3432 states have (on average 1.354020979020979) internal successors, (4647), 3460 states have internal predecessors, (4647), 652 states have call successors, (652), 378 states have call predecessors, (652), 378 states have return successors, (652), 625 states have call predecessors, (652), 652 states have call successors, (652) [2022-11-03 01:48:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5951 transitions. [2022-11-03 01:48:55,860 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5951 transitions. Word has length 111 [2022-11-03 01:48:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:55,860 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 5951 transitions. [2022-11-03 01:48:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-03 01:48:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5951 transitions. [2022-11-03 01:48:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:48:55,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:55,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:48:55,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:56,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1341230879, now seen corresponding path program 1 times [2022-11-03 01:48:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:56,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499476607] [2022-11-03 01:48:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:56,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 01:48:56,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499476607] [2022-11-03 01:48:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499476607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522184010] [2022-11-03 01:48:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:56,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:56,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:56,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:48:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:56,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:48:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:48:56,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:48:56,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522184010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:56,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:48:56,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:48:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560217360] [2022-11-03 01:48:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:56,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:56,405 INFO L87 Difference]: Start difference. First operand 4463 states and 5951 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:48:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:56,852 INFO L93 Difference]: Finished difference Result 8514 states and 11449 transitions. [2022-11-03 01:48:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-03 01:48:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:56,882 INFO L225 Difference]: With dead ends: 8514 [2022-11-03 01:48:56,883 INFO L226 Difference]: Without dead ends: 5542 [2022-11-03 01:48:56,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:48:56,892 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 65 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:56,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:48:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2022-11-03 01:48:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4982. [2022-11-03 01:48:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 3879 states have (on average 1.3642691415313226) internal successors, (5292), 3907 states have internal predecessors, (5292), 688 states have call successors, (688), 414 states have call predecessors, (688), 414 states have return successors, (688), 661 states have call predecessors, (688), 688 states have call successors, (688) [2022-11-03 01:48:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 6668 transitions. [2022-11-03 01:48:57,490 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 6668 transitions. Word has length 113 [2022-11-03 01:48:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:57,490 INFO L495 AbstractCegarLoop]: Abstraction has 4982 states and 6668 transitions. [2022-11-03 01:48:57,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:48:57,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 6668 transitions. [2022-11-03 01:48:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:48:57,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:57,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:48:57,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:57,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:57,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:48:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 468430558, now seen corresponding path program 2 times [2022-11-03 01:48:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139068811] [2022-11-03 01:48:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:48:58,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:58,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139068811] [2022-11-03 01:48:58,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139068811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:58,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902834824] [2022-11-03 01:48:58,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:48:58,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:58,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:58,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:58,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:48:58,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:48:58,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:58,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:48:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:48:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-03 01:48:58,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902834824] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:58,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:48:58,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 7] total 14 [2022-11-03 01:48:58,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611422826] [2022-11-03 01:48:58,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:58,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:48:58,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:48:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:48:58,891 INFO L87 Difference]: Start difference. First operand 4982 states and 6668 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:48:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:59,566 INFO L93 Difference]: Finished difference Result 9913 states and 13398 transitions. [2022-11-03 01:48:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:48:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-03 01:48:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:59,599 INFO L225 Difference]: With dead ends: 9913 [2022-11-03 01:48:59,600 INFO L226 Difference]: Without dead ends: 6422 [2022-11-03 01:48:59,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:48:59,658 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 111 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:59,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 271 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:48:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6422 states. [2022-11-03 01:49:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6422 to 6230. [2022-11-03 01:49:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6230 states, 5019 states have (on average 1.3460848774656307) internal successors, (6756), 5047 states have internal predecessors, (6756), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-03 01:49:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6230 states to 6230 states and 8216 transitions. [2022-11-03 01:49:00,231 INFO L78 Accepts]: Start accepts. Automaton has 6230 states and 8216 transitions. Word has length 113 [2022-11-03 01:49:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:00,232 INFO L495 AbstractCegarLoop]: Abstraction has 6230 states and 8216 transitions. [2022-11-03 01:49:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 6230 states and 8216 transitions. [2022-11-03 01:49:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:49:00,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:00,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:00,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:00,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:49:00,475 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash -763677826, now seen corresponding path program 1 times [2022-11-03 01:49:00,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:00,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187315222] [2022-11-03 01:49:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:49:00,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187315222] [2022-11-03 01:49:00,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187315222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:00,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568796719] [2022-11-03 01:49:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:00,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:00,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:00,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:49:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:49:00,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568796719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:00,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:00,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:49:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447043349] [2022-11-03 01:49:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:00,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:00,951 INFO L87 Difference]: Start difference. First operand 6230 states and 8216 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:01,569 INFO L93 Difference]: Finished difference Result 10440 states and 14070 transitions. [2022-11-03 01:49:01,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:01,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-03 01:49:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:01,618 INFO L225 Difference]: With dead ends: 10440 [2022-11-03 01:49:01,619 INFO L226 Difference]: Without dead ends: 6250 [2022-11-03 01:49:01,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:01,634 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 88 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 262 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2022-11-03 01:49:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 6170. [2022-11-03 01:49:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 4959 states have (on average 1.3139745916515426) internal successors, (6516), 4987 states have internal predecessors, (6516), 706 states have call successors, (706), 504 states have call predecessors, (706), 504 states have return successors, (754), 679 states have call predecessors, (754), 706 states have call successors, (754) [2022-11-03 01:49:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 7976 transitions. [2022-11-03 01:49:02,372 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 7976 transitions. Word has length 113 [2022-11-03 01:49:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:02,372 INFO L495 AbstractCegarLoop]: Abstraction has 6170 states and 7976 transitions. [2022-11-03 01:49:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 7976 transitions. [2022-11-03 01:49:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:49:02,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:02,385 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:02,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 01:49:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:49:02,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1128683810, now seen corresponding path program 1 times [2022-11-03 01:49:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:02,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042641475] [2022-11-03 01:49:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:49:02,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:02,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042641475] [2022-11-03 01:49:02,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042641475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142871733] [2022-11-03 01:49:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:02,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:02,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:02,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:02,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:49:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:03,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:49:03,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:03,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142871733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:03,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:03,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:49:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231460939] [2022-11-03 01:49:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:03,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:03,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:03,081 INFO L87 Difference]: Start difference. First operand 6170 states and 7976 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:03,702 INFO L93 Difference]: Finished difference Result 11251 states and 14618 transitions. [2022-11-03 01:49:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:03,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-03 01:49:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:03,734 INFO L225 Difference]: With dead ends: 11251 [2022-11-03 01:49:03,734 INFO L226 Difference]: Without dead ends: 7151 [2022-11-03 01:49:03,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:03,749 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 99 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:03,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-11-03 01:49:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 7151. [2022-11-03 01:49:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 5826 states have (on average 1.2868177136972194) internal successors, (7497), 5854 states have internal predecessors, (7497), 736 states have call successors, (736), 588 states have call predecessors, (736), 588 states have return successors, (784), 709 states have call predecessors, (784), 736 states have call successors, (784) [2022-11-03 01:49:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 9017 transitions. [2022-11-03 01:49:04,517 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 9017 transitions. Word has length 113 [2022-11-03 01:49:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:04,518 INFO L495 AbstractCegarLoop]: Abstraction has 7151 states and 9017 transitions. [2022-11-03 01:49:04,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 9017 transitions. [2022-11-03 01:49:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 01:49:04,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:04,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:04,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:04,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:04,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -918604943, now seen corresponding path program 1 times [2022-11-03 01:49:04,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:04,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18187297] [2022-11-03 01:49:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:49:05,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18187297] [2022-11-03 01:49:05,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18187297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218202566] [2022-11-03 01:49:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:05,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:05,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:05,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:49:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:05,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:49:05,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218202566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:05,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:05,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:49:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934062755] [2022-11-03 01:49:05,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:05,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:05,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:05,230 INFO L87 Difference]: Start difference. First operand 7151 states and 9017 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:05,964 INFO L93 Difference]: Finished difference Result 12068 states and 15528 transitions. [2022-11-03 01:49:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 114 [2022-11-03 01:49:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:05,991 INFO L225 Difference]: With dead ends: 12068 [2022-11-03 01:49:05,992 INFO L226 Difference]: Without dead ends: 7099 [2022-11-03 01:49:06,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:06,005 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 87 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:06,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 274 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-03 01:49:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7043. [2022-11-03 01:49:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7043 states, 5730 states have (on average 1.2581151832460733) internal successors, (7209), 5746 states have internal predecessors, (7209), 736 states have call successors, (736), 588 states have call predecessors, (736), 576 states have return successors, (772), 709 states have call predecessors, (772), 736 states have call successors, (772) [2022-11-03 01:49:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7043 states to 7043 states and 8717 transitions. [2022-11-03 01:49:06,639 INFO L78 Accepts]: Start accepts. Automaton has 7043 states and 8717 transitions. Word has length 114 [2022-11-03 01:49:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:06,639 INFO L495 AbstractCegarLoop]: Abstraction has 7043 states and 8717 transitions. [2022-11-03 01:49:06,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7043 states and 8717 transitions. [2022-11-03 01:49:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-03 01:49:06,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:06,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:06,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:06,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:06,875 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:06,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1796748787, now seen corresponding path program 1 times [2022-11-03 01:49:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:06,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348762120] [2022-11-03 01:49:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:06,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:49:07,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:07,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348762120] [2022-11-03 01:49:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348762120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093948134] [2022-11-03 01:49:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:07,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:07,173 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:07,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:49:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:07,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:49:07,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:49:07,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093948134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:07,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 01:49:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292966082] [2022-11-03 01:49:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:07,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:49:07,407 INFO L87 Difference]: Start difference. First operand 7043 states and 8717 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:49:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:08,472 INFO L93 Difference]: Finished difference Result 10154 states and 12597 transitions. [2022-11-03 01:49:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:49:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-03 01:49:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:08,501 INFO L225 Difference]: With dead ends: 10154 [2022-11-03 01:49:08,501 INFO L226 Difference]: Without dead ends: 7527 [2022-11-03 01:49:08,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:49:08,513 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 104 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:08,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 424 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2022-11-03 01:49:09,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7303. [2022-11-03 01:49:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 5940 states have (on average 1.2533670033670035) internal successors, (7445), 5974 states have internal predecessors, (7445), 744 states have call successors, (744), 594 states have call predecessors, (744), 618 states have return successors, (816), 735 states have call predecessors, (816), 744 states have call successors, (816) [2022-11-03 01:49:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 9005 transitions. [2022-11-03 01:49:09,248 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 9005 transitions. Word has length 116 [2022-11-03 01:49:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:09,248 INFO L495 AbstractCegarLoop]: Abstraction has 7303 states and 9005 transitions. [2022-11-03 01:49:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:49:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 9005 transitions. [2022-11-03 01:49:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 01:49:09,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:09,260 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:09,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:09,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:49:09,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:09,475 INFO L85 PathProgramCache]: Analyzing trace with hash 263649726, now seen corresponding path program 1 times [2022-11-03 01:49:09,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:09,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452598273] [2022-11-03 01:49:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:49:09,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452598273] [2022-11-03 01:49:09,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452598273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:09,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67684268] [2022-11-03 01:49:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:09,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:09,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:49:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:49:09,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:09,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67684268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:09,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:09,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:49:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262939977] [2022-11-03 01:49:09,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:09,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:09,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:09,920 INFO L87 Difference]: Start difference. First operand 7303 states and 9005 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:10,408 INFO L93 Difference]: Finished difference Result 9996 states and 12452 transitions. [2022-11-03 01:49:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-03 01:49:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:10,428 INFO L225 Difference]: With dead ends: 9996 [2022-11-03 01:49:10,428 INFO L226 Difference]: Without dead ends: 7045 [2022-11-03 01:49:10,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:10,435 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 21 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:10,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 213 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2022-11-03 01:49:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 6625. [2022-11-03 01:49:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5370 states have (on average 1.2562383612662942) internal successors, (6746), 5377 states have internal predecessors, (6746), 708 states have call successors, (708), 558 states have call predecessors, (708), 546 states have return successors, (744), 690 states have call predecessors, (744), 708 states have call successors, (744) [2022-11-03 01:49:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 8198 transitions. [2022-11-03 01:49:10,932 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 8198 transitions. Word has length 117 [2022-11-03 01:49:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 8198 transitions. [2022-11-03 01:49:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 8198 transitions. [2022-11-03 01:49:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 01:49:10,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:10,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:10,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:11,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:49:11,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash -584897462, now seen corresponding path program 1 times [2022-11-03 01:49:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:11,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658333098] [2022-11-03 01:49:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:49:11,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658333098] [2022-11-03 01:49:11,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658333098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:11,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569150692] [2022-11-03 01:49:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:11,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:11,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:11,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:49:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:49:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:49:11,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569150692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:11,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:11,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:49:11,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900642364] [2022-11-03 01:49:11,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:11,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:11,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:11,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:11,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:11,574 INFO L87 Difference]: Start difference. First operand 6625 states and 8198 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:12,425 INFO L93 Difference]: Finished difference Result 15683 states and 19643 transitions. [2022-11-03 01:49:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-03 01:49:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:12,456 INFO L225 Difference]: With dead ends: 15683 [2022-11-03 01:49:12,456 INFO L226 Difference]: Without dead ends: 9120 [2022-11-03 01:49:12,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:12,471 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 48 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:12,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 219 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:49:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9120 states. [2022-11-03 01:49:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9120 to 7317. [2022-11-03 01:49:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 5964 states have (on average 1.266934942991281) internal successors, (7556), 5972 states have internal predecessors, (7556), 757 states have call successors, (757), 607 states have call predecessors, (757), 595 states have return successors, (793), 738 states have call predecessors, (793), 757 states have call successors, (793) [2022-11-03 01:49:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 9106 transitions. [2022-11-03 01:49:13,069 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 9106 transitions. Word has length 117 [2022-11-03 01:49:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:13,069 INFO L495 AbstractCegarLoop]: Abstraction has 7317 states and 9106 transitions. [2022-11-03 01:49:13,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 9106 transitions. [2022-11-03 01:49:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 01:49:13,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:13,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:13,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:13,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:13,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 413587060, now seen corresponding path program 1 times [2022-11-03 01:49:13,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:13,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187848350] [2022-11-03 01:49:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:49:13,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187848350] [2022-11-03 01:49:13,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187848350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:13,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351911914] [2022-11-03 01:49:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:13,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:13,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:13,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:49:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:49:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:49:13,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:13,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351911914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:13,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:13,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 01:49:13,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811166783] [2022-11-03 01:49:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:49:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:49:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:13,724 INFO L87 Difference]: Start difference. First operand 7317 states and 9106 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:49:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:15,056 INFO L93 Difference]: Finished difference Result 14378 states and 17965 transitions. [2022-11-03 01:49:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:49:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 118 [2022-11-03 01:49:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:15,094 INFO L225 Difference]: With dead ends: 14378 [2022-11-03 01:49:15,095 INFO L226 Difference]: Without dead ends: 9372 [2022-11-03 01:49:15,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:15,113 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 188 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:15,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 368 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-03 01:49:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 8837. [2022-11-03 01:49:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 7184 states have (on average 1.257238307349666) internal successors, (9032), 7180 states have internal predecessors, (9032), 937 states have call successors, (937), 745 states have call predecessors, (937), 715 states have return successors, (991), 912 states have call predecessors, (991), 937 states have call successors, (991) [2022-11-03 01:49:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 10960 transitions. [2022-11-03 01:49:15,880 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 10960 transitions. Word has length 118 [2022-11-03 01:49:15,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:15,881 INFO L495 AbstractCegarLoop]: Abstraction has 8837 states and 10960 transitions. [2022-11-03 01:49:15,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:49:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 10960 transitions. [2022-11-03 01:49:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:49:15,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:15,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:15,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:49:16,107 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -399675774, now seen corresponding path program 1 times [2022-11-03 01:49:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435358529] [2022-11-03 01:49:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 01:49:16,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435358529] [2022-11-03 01:49:16,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435358529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877262790] [2022-11-03 01:49:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:16,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:16,211 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:49:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:16,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:16,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877262790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:16,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:16,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:49:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38279366] [2022-11-03 01:49:16,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:16,377 INFO L87 Difference]: Start difference. First operand 8837 states and 10960 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:17,072 INFO L93 Difference]: Finished difference Result 16289 states and 20390 transitions. [2022-11-03 01:49:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-11-03 01:49:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:17,109 INFO L225 Difference]: With dead ends: 16289 [2022-11-03 01:49:17,109 INFO L226 Difference]: Without dead ends: 10643 [2022-11-03 01:49:17,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:17,123 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 51 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:17,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 262 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10643 states. [2022-11-03 01:49:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10643 to 9689. [2022-11-03 01:49:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9689 states, 7908 states have (on average 1.2701062215477996) internal successors, (10044), 7904 states have internal predecessors, (10044), 1001 states have call successors, (1001), 809 states have call predecessors, (1001), 779 states have return successors, (1055), 976 states have call predecessors, (1055), 1001 states have call successors, (1055) [2022-11-03 01:49:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 12100 transitions. [2022-11-03 01:49:18,049 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 12100 transitions. Word has length 113 [2022-11-03 01:49:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:18,050 INFO L495 AbstractCegarLoop]: Abstraction has 9689 states and 12100 transitions. [2022-11-03 01:49:18,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:49:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 12100 transitions. [2022-11-03 01:49:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:49:18,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:18,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:18,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:18,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:18,287 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1461185143, now seen corresponding path program 1 times [2022-11-03 01:49:18,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442496381] [2022-11-03 01:49:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:18,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:49:18,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:18,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442496381] [2022-11-03 01:49:18,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442496381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:18,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:18,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 01:49:18,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116388771] [2022-11-03 01:49:18,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:18,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 01:49:18,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 01:49:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:49:18,907 INFO L87 Difference]: Start difference. First operand 9689 states and 12100 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 01:49:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:20,971 INFO L93 Difference]: Finished difference Result 21685 states and 27606 transitions. [2022-11-03 01:49:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:49:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 113 [2022-11-03 01:49:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:21,014 INFO L225 Difference]: With dead ends: 21685 [2022-11-03 01:49:21,015 INFO L226 Difference]: Without dead ends: 16784 [2022-11-03 01:49:21,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:49:21,026 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 554 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:21,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 472 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:49:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16784 states. [2022-11-03 01:49:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16784 to 13786. [2022-11-03 01:49:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13786 states, 11345 states have (on average 1.25165271044513) internal successors, (14200), 11374 states have internal predecessors, (14200), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1109 states have return successors, (1439), 1306 states have call predecessors, (1439), 1331 states have call successors, (1439) [2022-11-03 01:49:22,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13786 states to 13786 states and 16970 transitions. [2022-11-03 01:49:22,422 INFO L78 Accepts]: Start accepts. Automaton has 13786 states and 16970 transitions. Word has length 113 [2022-11-03 01:49:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:22,425 INFO L495 AbstractCegarLoop]: Abstraction has 13786 states and 16970 transitions. [2022-11-03 01:49:22,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-03 01:49:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13786 states and 16970 transitions. [2022-11-03 01:49:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 01:49:22,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:22,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 01:49:22,437 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:22,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1062311178, now seen corresponding path program 1 times [2022-11-03 01:49:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573819507] [2022-11-03 01:49:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:49:22,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573819507] [2022-11-03 01:49:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573819507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:22,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673288329] [2022-11-03 01:49:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:22,521 INFO L87 Difference]: Start difference. First operand 13786 states and 16970 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:24,032 INFO L93 Difference]: Finished difference Result 19194 states and 23912 transitions. [2022-11-03 01:49:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2022-11-03 01:49:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:24,075 INFO L225 Difference]: With dead ends: 19194 [2022-11-03 01:49:24,075 INFO L226 Difference]: Without dead ends: 13654 [2022-11-03 01:49:24,090 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 [2022-11-03 01:49:24,092 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 201 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:24,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 298 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2022-11-03 01:49:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13630. [2022-11-03 01:49:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13630 states, 11198 states have (on average 1.2407572780853724) internal successors, (13894), 11218 states have internal predecessors, (13894), 1331 states have call successors, (1331), 1106 states have call predecessors, (1331), 1100 states have return successors, (1430), 1306 states have call predecessors, (1430), 1331 states have call successors, (1430) [2022-11-03 01:49:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13630 states to 13630 states and 16655 transitions. [2022-11-03 01:49:25,366 INFO L78 Accepts]: Start accepts. Automaton has 13630 states and 16655 transitions. Word has length 113 [2022-11-03 01:49:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:25,366 INFO L495 AbstractCegarLoop]: Abstraction has 13630 states and 16655 transitions. [2022-11-03 01:49:25,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:25,367 INFO L276 IsEmpty]: Start isEmpty. Operand 13630 states and 16655 transitions. [2022-11-03 01:49:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 01:49:25,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:25,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 01:49:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 01:49:25,377 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 163584257, now seen corresponding path program 1 times [2022-11-03 01:49:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:25,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131309603] [2022-11-03 01:49:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 01:49:25,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131309603] [2022-11-03 01:49:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131309603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:25,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:25,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:49:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094786032] [2022-11-03 01:49:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:49:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:49:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:49:25,569 INFO L87 Difference]: Start difference. First operand 13630 states and 16655 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:27,130 INFO L93 Difference]: Finished difference Result 22966 states and 28070 transitions. [2022-11-03 01:49:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:49:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-11-03 01:49:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:27,172 INFO L225 Difference]: With dead ends: 22966 [2022-11-03 01:49:27,172 INFO L226 Difference]: Without dead ends: 17582 [2022-11-03 01:49:27,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:49:27,184 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 103 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:27,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 335 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2022-11-03 01:49:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 17049. [2022-11-03 01:49:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17049 states, 13907 states have (on average 1.2295966060257424) internal successors, (17100), 13969 states have internal predecessors, (17100), 1725 states have call successors, (1725), 1416 states have call predecessors, (1725), 1416 states have return successors, (1932), 1664 states have call predecessors, (1932), 1725 states have call successors, (1932) [2022-11-03 01:49:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17049 states to 17049 states and 20757 transitions. [2022-11-03 01:49:28,921 INFO L78 Accepts]: Start accepts. Automaton has 17049 states and 20757 transitions. Word has length 114 [2022-11-03 01:49:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:28,922 INFO L495 AbstractCegarLoop]: Abstraction has 17049 states and 20757 transitions. [2022-11-03 01:49:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:49:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 17049 states and 20757 transitions. [2022-11-03 01:49:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 01:49:28,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:28,934 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 01:49:28,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash 134362487, now seen corresponding path program 1 times [2022-11-03 01:49:28,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:28,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686090758] [2022-11-03 01:49:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:49:29,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:29,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686090758] [2022-11-03 01:49:29,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686090758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:29,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999115515] [2022-11-03 01:49:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:29,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:29,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:49:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:49:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:49:29,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:49:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 01:49:30,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999115515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:49:30,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524396394] [2022-11-03 01:49:30,205 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-11-03 01:49:30,205 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:49:30,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:49:30,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:49:30,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:49:37,995 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-03 01:49:42,983 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-03 01:49:50,584 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-03 01:49:50,608 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 92 for LOIs [2022-11-03 01:49:50,626 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-03 01:49:50,910 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-03 01:49:51,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:06,664 WARN L234 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 520 DAG size of output: 474 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:50:18,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '481967#(and (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 01:50:18,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:50:18,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:50:18,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 19 [2022-11-03 01:50:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393348276] [2022-11-03 01:50:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 01:50:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 01:50:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:50:18,791 INFO L87 Difference]: Start difference. First operand 17049 states and 20757 transitions. Second operand has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:50:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:50:23,395 INFO L93 Difference]: Finished difference Result 33161 states and 41100 transitions. [2022-11-03 01:50:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-03 01:50:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 119 [2022-11-03 01:50:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:50:23,441 INFO L225 Difference]: With dead ends: 33161 [2022-11-03 01:50:23,441 INFO L226 Difference]: Without dead ends: 16074 [2022-11-03 01:50:23,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8725 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1653, Invalid=19227, Unknown=0, NotChecked=0, Total=20880 [2022-11-03 01:50:23,476 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1491 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:50:23,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1502 Valid, 2254 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:50:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16074 states. [2022-11-03 01:50:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16074 to 10676. [2022-11-03 01:50:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10676 states, 8750 states have (on average 1.2326857142857144) internal successors, (10786), 8781 states have internal predecessors, (10786), 1024 states have call successors, (1024), 901 states have call predecessors, (1024), 901 states have return successors, (1093), 993 states have call predecessors, (1093), 1024 states have call successors, (1093) [2022-11-03 01:50:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10676 states to 10676 states and 12903 transitions. [2022-11-03 01:50:24,712 INFO L78 Accepts]: Start accepts. Automaton has 10676 states and 12903 transitions. Word has length 119 [2022-11-03 01:50:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:24,713 INFO L495 AbstractCegarLoop]: Abstraction has 10676 states and 12903 transitions. [2022-11-03 01:50:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 9.6) internal successors, (144), 17 states have internal predecessors, (144), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:50:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10676 states and 12903 transitions. [2022-11-03 01:50:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 01:50:24,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:24,721 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:50:24,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:50:24,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 01:50:24,941 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 795512980, now seen corresponding path program 1 times [2022-11-03 01:50:24,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:24,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855553632] [2022-11-03 01:50:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:24,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:50:25,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855553632] [2022-11-03 01:50:25,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855553632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:25,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755972357] [2022-11-03 01:50:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:25,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:25,511 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:25,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:50:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:50:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:50:25,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 01:50:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755972357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208702435] [2022-11-03 01:50:26,199 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-03 01:50:26,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:50:26,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:50:26,201 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:50:26,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:50:30,147 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-03 01:50:40,295 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-03 01:50:45,310 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-03 01:50:45,336 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-03 01:50:45,346 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 48 for LOIs [2022-11-03 01:50:45,403 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-03 01:50:45,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:50:54,076 WARN L234 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 354 DAG size of output: 308 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:05,136 WARN L234 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 446 DAG size of output: 301 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:12,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '543111#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:12,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:12,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:12,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-11-03 01:51:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128873719] [2022-11-03 01:51:12,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:51:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:51:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=4471, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 01:51:12,284 INFO L87 Difference]: Start difference. First operand 10676 states and 12903 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:51:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:16,669 INFO L93 Difference]: Finished difference Result 22759 states and 27884 transitions. [2022-11-03 01:51:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-03 01:51:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 122 [2022-11-03 01:51:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:16,705 INFO L225 Difference]: With dead ends: 22759 [2022-11-03 01:51:16,705 INFO L226 Difference]: Without dead ends: 12938 [2022-11-03 01:51:16,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 347 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8438 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1550, Invalid=19042, Unknown=0, NotChecked=0, Total=20592 [2022-11-03 01:51:16,730 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 818 mSDsluCounter, 3301 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:16,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 3123 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 01:51:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12938 states. [2022-11-03 01:51:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12938 to 7490. [2022-11-03 01:51:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 6222 states have (on average 1.2457409193185471) internal successors, (7751), 6233 states have internal predecessors, (7751), 656 states have call successors, (656), 615 states have call predecessors, (656), 611 states have return successors, (679), 641 states have call predecessors, (679), 656 states have call successors, (679) [2022-11-03 01:51:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 9086 transitions. [2022-11-03 01:51:17,844 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 9086 transitions. Word has length 122 [2022-11-03 01:51:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:17,845 INFO L495 AbstractCegarLoop]: Abstraction has 7490 states and 9086 transitions. [2022-11-03 01:51:17,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-03 01:51:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 9086 transitions. [2022-11-03 01:51:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 01:51:17,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:17,849 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:17,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:18,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 01:51:18,075 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 356584013, now seen corresponding path program 1 times [2022-11-03 01:51:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823638155] [2022-11-03 01:51:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:18,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 01:51:18,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823638155] [2022-11-03 01:51:18,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823638155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:18,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079425934] [2022-11-03 01:51:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:18,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:18,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:18,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:51:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:18,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 01:51:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 01:51:18,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 01:51:18,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079425934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:18,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087925974] [2022-11-03 01:51:18,972 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-03 01:51:18,972 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:18,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:18,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:18,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:22,716 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-03 01:52:19,291 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 167 for LOIs [2022-11-03 01:52:23,814 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 135 for LOIs [2022-11-03 01:52:23,838 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-03 01:52:23,848 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 50 for LOIs [2022-11-03 01:52:23,915 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-03 01:52:24,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:29,964 WARN L234 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 280 DAG size of output: 234 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:16,668 WARN L234 SmtUtils]: Spent 42.12s on a formula simplification. DAG size of input: 1582 DAG size of output: 1055 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:25,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585300#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 0 ~t3_pc~0) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:25,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:25,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:25,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2022-11-03 01:53:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034684147] [2022-11-03 01:53:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:25,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:53:25,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:25,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:53:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=4734, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 01:53:25,815 INFO L87 Difference]: Start difference. First operand 7490 states and 9086 transitions. Second operand has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-03 01:53:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:32,743 INFO L93 Difference]: Finished difference Result 19862 states and 24570 transitions. [2022-11-03 01:53:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-03 01:53:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 124 [2022-11-03 01:53:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:32,768 INFO L225 Difference]: With dead ends: 19862 [2022-11-03 01:53:32,768 INFO L226 Difference]: Without dead ends: 12936 [2022-11-03 01:53:32,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 379 SyntacticMatches, 5 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22415 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=3774, Invalid=47076, Unknown=0, NotChecked=0, Total=50850 [2022-11-03 01:53:32,784 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1063 mSDsluCounter, 3419 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:32,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1070 Valid, 3385 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:53:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12936 states. [2022-11-03 01:53:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12936 to 9244. [2022-11-03 01:53:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9244 states, 7664 states have (on average 1.2175104384133613) internal successors, (9331), 7683 states have internal predecessors, (9331), 808 states have call successors, (808), 764 states have call predecessors, (808), 771 states have return successors, (989), 796 states have call predecessors, (989), 808 states have call successors, (989) [2022-11-03 01:53:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9244 states to 9244 states and 11128 transitions. [2022-11-03 01:53:33,705 INFO L78 Accepts]: Start accepts. Automaton has 9244 states and 11128 transitions. Word has length 124 [2022-11-03 01:53:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:33,706 INFO L495 AbstractCegarLoop]: Abstraction has 9244 states and 11128 transitions. [2022-11-03 01:53:33,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.142857142857142) internal successors, (128), 15 states have internal predecessors, (128), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-03 01:53:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9244 states and 11128 transitions. [2022-11-03 01:53:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:53:33,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:33,713 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:33,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 01:53:33,927 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1199577155, now seen corresponding path program 1 times [2022-11-03 01:53:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376247917] [2022-11-03 01:53:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:53:34,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376247917] [2022-11-03 01:53:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376247917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912351603] [2022-11-03 01:53:34,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:34,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:34,596 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:34,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:53:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 01:53:34,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 01:53:35,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-03 01:53:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912351603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463066323] [2022-11-03 01:53:35,908 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2022-11-03 01:53:35,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:35,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:35,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:35,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:41,300 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-11-03 01:53:41,316 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-11-03 01:53:41,333 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-03 01:53:41,341 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 39 for LOIs [2022-11-03 01:53:41,348 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2022-11-03 01:53:41,417 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-03 01:53:41,642 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:58,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '625857#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= ~t2_i~0 1) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:58,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:58,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:58,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-03 01:53:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970929220] [2022-11-03 01:53:58,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 01:53:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 01:53:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=8273, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 01:53:58,528 INFO L87 Difference]: Start difference. First operand 9244 states and 11128 transitions. Second operand has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-03 01:54:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:07,084 INFO L93 Difference]: Finished difference Result 20583 states and 24905 transitions. [2022-11-03 01:54:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-03 01:54:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 126 [2022-11-03 01:54:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:07,110 INFO L225 Difference]: With dead ends: 20583 [2022-11-03 01:54:07,111 INFO L226 Difference]: Without dead ends: 13726 [2022-11-03 01:54:07,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 305 SyntacticMatches, 18 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10934 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=2575, Invalid=23185, Unknown=0, NotChecked=0, Total=25760 [2022-11-03 01:54:07,125 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 4664 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 1991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4664 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 5241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1991 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:07,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4664 Valid, 1068 Invalid, 5241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1991 Valid, 3250 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 01:54:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13726 states. [2022-11-03 01:54:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13726 to 9044. [2022-11-03 01:54:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9044 states, 7465 states have (on average 1.2179504353650368) internal successors, (9092), 7489 states have internal predecessors, (9092), 811 states have call successors, (811), 755 states have call predecessors, (811), 767 states have return successors, (943), 799 states have call predecessors, (943), 811 states have call successors, (943) [2022-11-03 01:54:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 10846 transitions. [2022-11-03 01:54:08,206 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 10846 transitions. Word has length 126 [2022-11-03 01:54:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:08,206 INFO L495 AbstractCegarLoop]: Abstraction has 9044 states and 10846 transitions. [2022-11-03 01:54:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.041666666666666) internal successors, (193), 27 states have internal predecessors, (193), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-03 01:54:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 10846 transitions. [2022-11-03 01:54:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 01:54:08,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:08,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:08,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:08,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,423 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1181254839, now seen corresponding path program 1 times [2022-11-03 01:54:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220069592] [2022-11-03 01:54:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 01:54:08,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220069592] [2022-11-03 01:54:08,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220069592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105357325] [2022-11-03 01:54:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:08,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:08,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:54:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:08,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:54:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 01:54:08,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:08,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105357325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:08,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:54:08,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 01:54:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024244545] [2022-11-03 01:54:08,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:08,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:08,870 INFO L87 Difference]: Start difference. First operand 9044 states and 10846 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:54:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:09,956 INFO L93 Difference]: Finished difference Result 17869 states and 21508 transitions. [2022-11-03 01:54:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 140 [2022-11-03 01:54:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:09,972 INFO L225 Difference]: With dead ends: 17869 [2022-11-03 01:54:09,972 INFO L226 Difference]: Without dead ends: 9521 [2022-11-03 01:54:09,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:09,983 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 78 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:09,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 150 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:54:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2022-11-03 01:54:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 9308. [2022-11-03 01:54:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 7713 states have (on average 1.2044600025930248) internal successors, (9290), 7737 states have internal predecessors, (9290), 811 states have call successors, (811), 771 states have call predecessors, (811), 783 states have return successors, (955), 799 states have call predecessors, (955), 811 states have call successors, (955) [2022-11-03 01:54:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 11056 transitions. [2022-11-03 01:54:11,086 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 11056 transitions. Word has length 140 [2022-11-03 01:54:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:11,086 INFO L495 AbstractCegarLoop]: Abstraction has 9308 states and 11056 transitions. [2022-11-03 01:54:11,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:54:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 11056 transitions. [2022-11-03 01:54:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 01:54:11,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:11,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:11,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:11,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:11,307 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash -601103667, now seen corresponding path program 1 times [2022-11-03 01:54:11,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:11,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655122473] [2022-11-03 01:54:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:11,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 01:54:11,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655122473] [2022-11-03 01:54:11,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655122473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167826759] [2022-11-03 01:54:11,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:11,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:11,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:11,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 01:54:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:54:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:54:11,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:11,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167826759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:11,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:54:11,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-03 01:54:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954378923] [2022-11-03 01:54:11,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:11,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:11,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:11,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:11,570 INFO L87 Difference]: Start difference. First operand 9308 states and 11056 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:54:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:12,328 INFO L93 Difference]: Finished difference Result 14042 states and 16863 transitions. [2022-11-03 01:54:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2022-11-03 01:54:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:12,338 INFO L225 Difference]: With dead ends: 14042 [2022-11-03 01:54:12,338 INFO L226 Difference]: Without dead ends: 5449 [2022-11-03 01:54:12,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:54:12,348 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:12,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:54:12,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2022-11-03 01:54:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 5316. [2022-11-03 01:54:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 4397 states have (on average 1.1660222879235842) internal successors, (5127), 4408 states have internal predecessors, (5127), 469 states have call successors, (469), 449 states have call predecessors, (469), 449 states have return successors, (481), 458 states have call predecessors, (481), 469 states have call successors, (481) [2022-11-03 01:54:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 6077 transitions. [2022-11-03 01:54:12,991 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 6077 transitions. Word has length 141 [2022-11-03 01:54:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:12,992 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 6077 transitions. [2022-11-03 01:54:12,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 01:54:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 6077 transitions. [2022-11-03 01:54:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:54:12,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:12,995 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:13,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-03 01:54:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 01:54:13,197 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1817421069, now seen corresponding path program 2 times [2022-11-03 01:54:13,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:13,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547320343] [2022-11-03 01:54:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-03 01:54:13,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547320343] [2022-11-03 01:54:13,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547320343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:13,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119851419] [2022-11-03 01:54:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:54:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:13,394 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:13,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 01:54:13,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:54:13,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 01:54:13,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:54:13,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:54:13,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119851419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:13,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:54:13,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 01:54:13,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371580552] [2022-11-03 01:54:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:13,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:54:13,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:54:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:13,605 INFO L87 Difference]: Start difference. First operand 5316 states and 6077 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 01:54:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:14,660 INFO L93 Difference]: Finished difference Result 11076 states and 12731 transitions. [2022-11-03 01:54:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:54:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 143 [2022-11-03 01:54:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:14,673 INFO L225 Difference]: With dead ends: 11076 [2022-11-03 01:54:14,674 INFO L226 Difference]: Without dead ends: 6585 [2022-11-03 01:54:14,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:54:14,681 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 210 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:14,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 336 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:54:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6585 states. [2022-11-03 01:54:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6585 to 6045. [2022-11-03 01:54:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 4946 states have (on average 1.1522442377678932) internal successors, (5699), 4965 states have internal predecessors, (5699), 563 states have call successors, (563), 523 states have call predecessors, (563), 535 states have return successors, (625), 556 states have call predecessors, (625), 563 states have call successors, (625) [2022-11-03 01:54:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 6887 transitions. [2022-11-03 01:54:15,429 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 6887 transitions. Word has length 143 [2022-11-03 01:54:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:15,429 INFO L495 AbstractCegarLoop]: Abstraction has 6045 states and 6887 transitions. [2022-11-03 01:54:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-03 01:54:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 6887 transitions. [2022-11-03 01:54:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-03 01:54:15,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:15,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:54:15,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 01:54:15,633 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:15,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1857649564, now seen corresponding path program 1 times [2022-11-03 01:54:15,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046902342] [2022-11-03 01:54:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-03 01:54:15,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046902342] [2022-11-03 01:54:15,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046902342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:15,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:15,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:54:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276081175] [2022-11-03 01:54:15,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:15,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:54:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:54:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:15,929 INFO L87 Difference]: Start difference. First operand 6045 states and 6887 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:54:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:18,939 INFO L93 Difference]: Finished difference Result 19295 states and 22108 transitions. [2022-11-03 01:54:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:54:18,940 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), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 172 [2022-11-03 01:54:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:18,967 INFO L225 Difference]: With dead ends: 19295 [2022-11-03 01:54:18,967 INFO L226 Difference]: Without dead ends: 16728 [2022-11-03 01:54:18,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:54:18,976 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 368 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:18,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1121 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:54:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16728 states. [2022-11-03 01:54:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16728 to 10471. [2022-11-03 01:54:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10471 states, 8510 states have (on average 1.1486486486486487) internal successors, (9775), 8540 states have internal predecessors, (9775), 1018 states have call successors, (1018), 923 states have call predecessors, (1018), 942 states have return successors, (1136), 1007 states have call predecessors, (1136), 1018 states have call successors, (1136) [2022-11-03 01:54:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10471 states to 10471 states and 11929 transitions. [2022-11-03 01:54:20,496 INFO L78 Accepts]: Start accepts. Automaton has 10471 states and 11929 transitions. Word has length 172 [2022-11-03 01:54:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:20,497 INFO L495 AbstractCegarLoop]: Abstraction has 10471 states and 11929 transitions. [2022-11-03 01:54:20,497 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), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:54:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10471 states and 11929 transitions. [2022-11-03 01:54:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-03 01:54:20,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:20,503 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:20,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 01:54:20,503 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:20,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1774534810, now seen corresponding path program 1 times [2022-11-03 01:54:20,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:20,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811971073] [2022-11-03 01:54:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:20,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-03 01:54:21,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:21,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811971073] [2022-11-03 01:54:21,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811971073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:21,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338163981] [2022-11-03 01:54:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:21,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:21,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:21,341 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42a714c6-de3d-4bb6-90bb-9b7dd64713bd/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 01:54:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:21,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 01:54:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-03 01:54:21,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:54:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-03 01:54:22,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338163981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:54:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432332497] [2022-11-03 01:54:22,221 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-11-03 01:54:22,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:54:22,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:54:22,222 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:54:22,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs