./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/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_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/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_1e17fcad-ca37-478e-be05-e0c362e85d59/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 ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 --- 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 01:49:24,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:49:24,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:49:24,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:49:24,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:49:24,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:49:24,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:49:24,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:49:24,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:49:24,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:49:24,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:49:24,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:49:24,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:49:24,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:49:24,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:49:24,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:49:24,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:49:24,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:49:24,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:49:24,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:49:24,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:49:24,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:49:24,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:49:24,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:49:24,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:49:24,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:49:24,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:49:24,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:49:24,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:49:24,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:49:24,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:49:24,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:49:24,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:49:24,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:49:24,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:49:24,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:49:24,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:49:24,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:49:24,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:49:24,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:49:24,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:49:24,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:49:24,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:49:24,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:49:24,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:49:24,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:49:24,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:49:24,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:49:24,191 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:49:24,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:49:24,191 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:49:24,192 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:49:24,192 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:49:24,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:49:24,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:49:24,193 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:49:24,193 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:49:24,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:49:24,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:49:24,194 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:49:24,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:49:24,195 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:49:24,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:49:24,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:49:24,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:49:24,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:49:24,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:49:24,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:49:24,197 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:49:24,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:49:24,197 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:49:24,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:49:24,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:49:24,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:49:24,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:24,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:49:24,199 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:49:24,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:49:24,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:49:24,199 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:49:24,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:49:24,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:49:24,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:49:24,200 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_1e17fcad-ca37-478e-be05-e0c362e85d59/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae06fa96255229a08f1e8c01eaa7f353b1ba462dacd64e058a3c6957598773d9 [2022-11-03 01:49:24,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:49:24,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:49:24,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:49:24,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:49:24,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:49:24,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2022-11-03 01:49:24,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/data/5fb1f8609/2b70645e4053454cb10ee15e8d4bdf87/FLAG023c2bb0d [2022-11-03 01:49:25,175 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:49:25,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/sv-benchmarks/c/systemc/token_ring.09.cil-2.c [2022-11-03 01:49:25,187 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/data/5fb1f8609/2b70645e4053454cb10ee15e8d4bdf87/FLAG023c2bb0d [2022-11-03 01:49:25,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/data/5fb1f8609/2b70645e4053454cb10ee15e8d4bdf87 [2022-11-03 01:49:25,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:49:25,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:49:25,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:25,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:49:25,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:49:25,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:25" (1/1) ... [2022-11-03 01:49:25,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e96210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:25, skipping insertion in model container [2022-11-03 01:49:25,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:49:25" (1/1) ... [2022-11-03 01:49:25,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:49:25,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:49:25,755 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_1e17fcad-ca37-478e-be05-e0c362e85d59/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2022-11-03 01:49:25,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:25,920 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:49:25,942 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_1e17fcad-ca37-478e-be05-e0c362e85d59/sv-benchmarks/c/systemc/token_ring.09.cil-2.c[671,684] [2022-11-03 01:49:26,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:49:26,042 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:49:26,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26 WrapperNode [2022-11-03 01:49:26,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:49:26,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:26,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:49:26,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:49:26,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,099 INFO L138 Inliner]: procedures = 46, calls = 59, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 684 [2022-11-03 01:49:26,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:49:26,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:49:26,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:49:26,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:49:26,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:49:26,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:49:26,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:49:26,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:49:26,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (1/1) ... [2022-11-03 01:49:26,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:49:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:26,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:49:26,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:49:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 01:49:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 01:49:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:49:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:49:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:49:26,265 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:49:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:49:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:49:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:49:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:49:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:49:26,266 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:49:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:49:26,266 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:49:26,267 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:49:26,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:49:26,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:49:26,410 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:49:26,428 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:49:27,257 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:49:27,661 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:49:27,662 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 01:49:27,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:27 BoogieIcfgContainer [2022-11-03 01:49:27,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:49:27,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:49:27,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:49:27,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:49:27,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:49:25" (1/3) ... [2022-11-03 01:49:27,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4818483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:27, skipping insertion in model container [2022-11-03 01:49:27,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:49:26" (2/3) ... [2022-11-03 01:49:27,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4818483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:49:27, skipping insertion in model container [2022-11-03 01:49:27,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:49:27" (3/3) ... [2022-11-03 01:49:27,674 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.09.cil-2.c [2022-11-03 01:49:27,693 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:49:27,693 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:49:27,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:49:27,775 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;@1635210f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:49:27,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:49:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 127 states have (on average 1.5590551181102361) internal successors, (198), 131 states have internal predecessors, (198), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-03 01:49:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 01:49:27,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:27,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:27,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash -299133806, now seen corresponding path program 1 times [2022-11-03 01:49:27,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:27,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650166689] [2022-11-03 01:49:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:28,448 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 01:49:28,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:28,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650166689] [2022-11-03 01:49:28,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650166689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:28,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:28,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:49:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081400539] [2022-11-03 01:49:28,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:28,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:49:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:28,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:49:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:28,495 INFO L87 Difference]: Start difference. First operand has 161 states, 127 states have (on average 1.5590551181102361) internal successors, (198), 131 states have internal predecessors, (198), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:49:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:28,942 INFO L93 Difference]: Finished difference Result 460 states and 723 transitions. [2022-11-03 01:49:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:49:28,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2022-11-03 01:49:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:28,965 INFO L225 Difference]: With dead ends: 460 [2022-11-03 01:49:28,965 INFO L226 Difference]: Without dead ends: 300 [2022-11-03 01:49:28,974 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 01:49:28,982 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 421 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 654 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:49:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-03 01:49:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-11-03 01:49:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 242 states have (on average 1.512396694214876) internal successors, (366), 245 states have internal predecessors, (366), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 01:49:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 452 transitions. [2022-11-03 01:49:29,051 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 452 transitions. Word has length 58 [2022-11-03 01:49:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:29,052 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 452 transitions. [2022-11-03 01:49:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:49:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 452 transitions. [2022-11-03 01:49:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:29,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:29,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:29,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:49:29,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -483413149, now seen corresponding path program 1 times [2022-11-03 01:49:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:29,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549664040] [2022-11-03 01:49:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:29,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549664040] [2022-11-03 01:49:29,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549664040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723733576] [2022-11-03 01:49:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:29,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:29,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:29,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:49:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:29,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:49:29,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:29,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723733576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:29,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:29,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:49:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557538444] [2022-11-03 01:49:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:29,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:29,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:29,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:29,866 INFO L87 Difference]: Start difference. First operand 299 states and 452 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:30,045 INFO L93 Difference]: Finished difference Result 880 states and 1353 transitions. [2022-11-03 01:49:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-11-03 01:49:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:30,051 INFO L225 Difference]: With dead ends: 880 [2022-11-03 01:49:30,051 INFO L226 Difference]: Without dead ends: 586 [2022-11-03 01:49:30,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 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 01:49:30,054 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 195 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:30,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 439 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-03 01:49:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 580. [2022-11-03 01:49:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 475 states have (on average 1.5094736842105263) internal successors, (717), 479 states have internal predecessors, (717), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-03 01:49:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 875 transitions. [2022-11-03 01:49:30,125 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 875 transitions. Word has length 115 [2022-11-03 01:49:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:30,125 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 875 transitions. [2022-11-03 01:49:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 875 transitions. [2022-11-03 01:49:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:30,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:30,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:30,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:30,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 01:49:30,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1817710047, now seen corresponding path program 1 times [2022-11-03 01:49:30,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:30,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187165897] [2022-11-03 01:49:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:30,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:30,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187165897] [2022-11-03 01:49:30,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187165897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:30,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618592001] [2022-11-03 01:49:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:30,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:30,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:30,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:30,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:49:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:30,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:49:30,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:30,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618592001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:30,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:30,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:49:30,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910856017] [2022-11-03 01:49:30,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:30,849 INFO L87 Difference]: Start difference. First operand 580 states and 875 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:31,034 INFO L93 Difference]: Finished difference Result 1717 states and 2634 transitions. [2022-11-03 01:49:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:31,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-11-03 01:49:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:31,041 INFO L225 Difference]: With dead ends: 1717 [2022-11-03 01:49:31,041 INFO L226 Difference]: Without dead ends: 1142 [2022-11-03 01:49:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 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 01:49:31,044 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 213 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:31,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 427 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-11-03 01:49:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1134. [2022-11-03 01:49:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 935 states have (on average 1.504812834224599) internal successors, (1407), 941 states have internal predecessors, (1407), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-03 01:49:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1705 transitions. [2022-11-03 01:49:31,113 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1705 transitions. Word has length 115 [2022-11-03 01:49:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:31,113 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 1705 transitions. [2022-11-03 01:49:31,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1705 transitions. [2022-11-03 01:49:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:31,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:31,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:31,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:31,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:31,339 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash -29278881, now seen corresponding path program 1 times [2022-11-03 01:49:31,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:31,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011851337] [2022-11-03 01:49:31,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:31,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:31,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:31,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:31,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011851337] [2022-11-03 01:49:31,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011851337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:31,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002243932] [2022-11-03 01:49:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:31,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:31,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:31,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:49:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:31,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:49:31,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002243932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:31,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:31,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:49:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183610499] [2022-11-03 01:49:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:31,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:31,865 INFO L87 Difference]: Start difference. First operand 1134 states and 1705 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:32,081 INFO L93 Difference]: Finished difference Result 3367 states and 5146 transitions. [2022-11-03 01:49:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-11-03 01:49:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:32,095 INFO L225 Difference]: With dead ends: 3367 [2022-11-03 01:49:32,095 INFO L226 Difference]: Without dead ends: 2238 [2022-11-03 01:49:32,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 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 01:49:32,100 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 216 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:32,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 437 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2022-11-03 01:49:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2226. [2022-11-03 01:49:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1843 states have (on average 1.4991861096039067) internal successors, (2763), 1853 states have internal predecessors, (2763), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-11-03 01:49:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3333 transitions. [2022-11-03 01:49:32,236 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3333 transitions. Word has length 115 [2022-11-03 01:49:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:32,239 INFO L495 AbstractCegarLoop]: Abstraction has 2226 states and 3333 transitions. [2022-11-03 01:49:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3333 transitions. [2022-11-03 01:49:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:32,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:32,247 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:32,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:32,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:32,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:32,463 INFO L85 PathProgramCache]: Analyzing trace with hash 54280545, now seen corresponding path program 1 times [2022-11-03 01:49:32,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:32,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558795625] [2022-11-03 01:49:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:49:32,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558795625] [2022-11-03 01:49:32,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558795625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243322142] [2022-11-03 01:49:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:32,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:32,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:32,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:49:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:32,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:32,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:49:32,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:32,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243322142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:32,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:32,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:49:32,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659913462] [2022-11-03 01:49:32,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:32,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:32,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:32,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:49:32,888 INFO L87 Difference]: Start difference. First operand 2226 states and 3333 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:33,146 INFO L93 Difference]: Finished difference Result 6619 states and 10070 transitions. [2022-11-03 01:49:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-11-03 01:49:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:33,212 INFO L225 Difference]: With dead ends: 6619 [2022-11-03 01:49:33,212 INFO L226 Difference]: Without dead ends: 4398 [2022-11-03 01:49:33,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 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 01:49:33,223 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 207 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:33,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 403 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-11-03 01:49:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 4378. [2022-11-03 01:49:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 3635 states have (on average 1.4929848693259973) internal successors, (5427), 3653 states have internal predecessors, (5427), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-11-03 01:49:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 6525 transitions. [2022-11-03 01:49:33,453 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 6525 transitions. Word has length 115 [2022-11-03 01:49:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:33,454 INFO L495 AbstractCegarLoop]: Abstraction has 4378 states and 6525 transitions. [2022-11-03 01:49:33,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 6525 transitions. [2022-11-03 01:49:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:33,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:33,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:33,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:33,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2138680545, now seen corresponding path program 1 times [2022-11-03 01:49:33,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:33,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105254924] [2022-11-03 01:49:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:33,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:49:33,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:33,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105254924] [2022-11-03 01:49:33,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105254924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:49:33,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597034822] [2022-11-03 01:49:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:49:33,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:49:33,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:49:33,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:49:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:34,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:49:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:49:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:49:34,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:49:34,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597034822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:34,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:49:34,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-03 01:49:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954479896] [2022-11-03 01:49:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:34,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:49:34,115 INFO L87 Difference]: Start difference. First operand 4378 states and 6525 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:34,550 INFO L93 Difference]: Finished difference Result 13027 states and 19718 transitions. [2022-11-03 01:49:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-11-03 01:49:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:34,593 INFO L225 Difference]: With dead ends: 13027 [2022-11-03 01:49:34,594 INFO L226 Difference]: Without dead ends: 8654 [2022-11-03 01:49:34,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 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 01:49:34,609 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 201 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:34,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 403 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2022-11-03 01:49:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 8618. [2022-11-03 01:49:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 7171 states have (on average 1.4864035699344582) internal successors, (10659), 7205 states have internal predecessors, (10659), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-11-03 01:49:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 12781 transitions. [2022-11-03 01:49:35,115 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 12781 transitions. Word has length 115 [2022-11-03 01:49:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:35,115 INFO L495 AbstractCegarLoop]: Abstraction has 8618 states and 12781 transitions. [2022-11-03 01:49:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:49:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 12781 transitions. [2022-11-03 01:49:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 01:49:35,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:35,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:35,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:49:35,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:49:35,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:35,343 INFO L85 PathProgramCache]: Analyzing trace with hash -63435939, now seen corresponding path program 1 times [2022-11-03 01:49:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856476917] [2022-11-03 01:49:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:35,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 01:49:35,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856476917] [2022-11-03 01:49:35,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856476917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:35,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:35,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671095757] [2022-11-03 01:49:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:35,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:35,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:35,444 INFO L87 Difference]: Start difference. First operand 8618 states and 12781 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:49:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:36,076 INFO L93 Difference]: Finished difference Result 15310 states and 23120 transitions. [2022-11-03 01:49:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-11-03 01:49:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:36,165 INFO L225 Difference]: With dead ends: 15310 [2022-11-03 01:49:36,166 INFO L226 Difference]: Without dead ends: 10890 [2022-11-03 01:49:36,186 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 01:49:36,187 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 101 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:36,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 509 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10890 states. [2022-11-03 01:49:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10890 to 10202. [2022-11-03 01:49:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 8691 states have (on average 1.5283626740306064) internal successors, (13283), 8725 states have internal predecessors, (13283), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-11-03 01:49:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 15469 transitions. [2022-11-03 01:49:36,869 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 15469 transitions. Word has length 115 [2022-11-03 01:49:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:36,869 INFO L495 AbstractCegarLoop]: Abstraction has 10202 states and 15469 transitions. [2022-11-03 01:49:36,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:49:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 15469 transitions. [2022-11-03 01:49:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:49:36,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:36,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:36,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:49:36,898 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1063085318, now seen corresponding path program 1 times [2022-11-03 01:49:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:36,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090570235] [2022-11-03 01:49:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 01:49:36,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:36,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090570235] [2022-11-03 01:49:36,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090570235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:36,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712175262] [2022-11-03 01:49:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:36,997 INFO L87 Difference]: Start difference. First operand 10202 states and 15469 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:38,041 INFO L93 Difference]: Finished difference Result 30307 states and 46486 transitions. [2022-11-03 01:49:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-03 01:49:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:38,139 INFO L225 Difference]: With dead ends: 30307 [2022-11-03 01:49:38,139 INFO L226 Difference]: Without dead ends: 20110 [2022-11-03 01:49:38,176 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 01:49:38,177 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 203 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:38,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2022-11-03 01:49:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 20010. [2022-11-03 01:49:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20010 states, 17059 states have (on average 1.5196084178439533) internal successors, (25923), 17125 states have internal predecessors, (25923), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-11-03 01:49:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20010 states to 20010 states and 30157 transitions. [2022-11-03 01:49:39,458 INFO L78 Accepts]: Start accepts. Automaton has 20010 states and 30157 transitions. Word has length 156 [2022-11-03 01:49:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:39,459 INFO L495 AbstractCegarLoop]: Abstraction has 20010 states and 30157 transitions. [2022-11-03 01:49:39,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20010 states and 30157 transitions. [2022-11-03 01:49:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:49:39,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:39,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:49:39,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1489110019, now seen corresponding path program 1 times [2022-11-03 01:49:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978765693] [2022-11-03 01:49:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 01:49:39,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978765693] [2022-11-03 01:49:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978765693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:39,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:39,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143684958] [2022-11-03 01:49:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:39,618 INFO L87 Difference]: Start difference. First operand 20010 states and 30157 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:41,712 INFO L93 Difference]: Finished difference Result 59443 states and 90582 transitions. [2022-11-03 01:49:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-03 01:49:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:41,919 INFO L225 Difference]: With dead ends: 59443 [2022-11-03 01:49:41,919 INFO L226 Difference]: Without dead ends: 39438 [2022-11-03 01:49:42,000 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 01:49:42,003 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 205 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:42,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39438 states. [2022-11-03 01:49:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39438 to 39242. [2022-11-03 01:49:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39242 states, 33475 states have (on average 1.510470500373413) internal successors, (50563), 33605 states have internal predecessors, (50563), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-11-03 01:49:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39242 states to 39242 states and 58765 transitions. [2022-11-03 01:49:44,353 INFO L78 Accepts]: Start accepts. Automaton has 39242 states and 58765 transitions. Word has length 156 [2022-11-03 01:49:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:44,353 INFO L495 AbstractCegarLoop]: Abstraction has 39242 states and 58765 transitions. [2022-11-03 01:49:44,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:44,354 INFO L276 IsEmpty]: Start isEmpty. Operand 39242 states and 58765 transitions. [2022-11-03 01:49:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:49:44,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:44,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:49:44,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1422193066, now seen corresponding path program 1 times [2022-11-03 01:49:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485811252] [2022-11-03 01:49:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 01:49:44,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485811252] [2022-11-03 01:49:44,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485811252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:44,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:44,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445359470] [2022-11-03 01:49:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:44,576 INFO L87 Difference]: Start difference. First operand 39242 states and 58765 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:47,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:47,487 INFO L93 Difference]: Finished difference Result 116563 states and 176406 transitions. [2022-11-03 01:49:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-03 01:49:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:47,847 INFO L225 Difference]: With dead ends: 116563 [2022-11-03 01:49:47,847 INFO L226 Difference]: Without dead ends: 77326 [2022-11-03 01:49:47,961 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 01:49:47,962 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 207 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:47,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:49:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77326 states. [2022-11-03 01:49:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77326 to 76938. [2022-11-03 01:49:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76938 states, 65667 states have (on average 1.500951771818417) internal successors, (98563), 65925 states have internal predecessors, (98563), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-11-03 01:49:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76938 states to 76938 states and 114445 transitions. [2022-11-03 01:49:52,320 INFO L78 Accepts]: Start accepts. Automaton has 76938 states and 114445 transitions. Word has length 156 [2022-11-03 01:49:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:49:52,321 INFO L495 AbstractCegarLoop]: Abstraction has 76938 states and 114445 transitions. [2022-11-03 01:49:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 76938 states and 114445 transitions. [2022-11-03 01:49:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 01:49:52,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:49:52,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:49:52,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:49:52,565 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:49:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:49:52,566 INFO L85 PathProgramCache]: Analyzing trace with hash 915123243, now seen corresponding path program 1 times [2022-11-03 01:49:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:49:52,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062171019] [2022-11-03 01:49:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:49:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:49:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:49:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-03 01:49:52,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:49:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062171019] [2022-11-03 01:49:52,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062171019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:49:52,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:49:52,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:49:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968308450] [2022-11-03 01:49:52,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:49:52,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:49:52,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:49:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:49:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:49:52,980 INFO L87 Difference]: Start difference. First operand 76938 states and 114445 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:49:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:49:58,547 INFO L93 Difference]: Finished difference Result 228499 states and 343318 transitions. [2022-11-03 01:49:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:49:58,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-11-03 01:49:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:49:59,461 INFO L225 Difference]: With dead ends: 228499 [2022-11-03 01:49:59,461 INFO L226 Difference]: Without dead ends: 151566 [2022-11-03 01:49:59,682 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 01:49:59,682 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 210 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:49:59,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 425 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:49:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151566 states. [2022-11-03 01:50:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151566 to 150794. [2022-11-03 01:50:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150794 states, 128771 states have (on average 1.4910422377709267) internal successors, (192003), 129285 states have internal predecessors, (192003), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-11-03 01:50:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150794 states to 150794 states and 222733 transitions. [2022-11-03 01:50:07,015 INFO L78 Accepts]: Start accepts. Automaton has 150794 states and 222733 transitions. Word has length 156 [2022-11-03 01:50:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:50:07,016 INFO L495 AbstractCegarLoop]: Abstraction has 150794 states and 222733 transitions. [2022-11-03 01:50:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:50:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 150794 states and 222733 transitions. [2022-11-03 01:50:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-03 01:50:07,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:50:07,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 01:50:07,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 01:50:07,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:50:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:50:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1701322803, now seen corresponding path program 1 times [2022-11-03 01:50:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:50:07,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542864159] [2022-11-03 01:50:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:07,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:50:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 01:50:07,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:50:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542864159] [2022-11-03 01:50:07,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542864159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:50:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313362394] [2022-11-03 01:50:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:50:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:07,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:07,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e17fcad-ca37-478e-be05-e0c362e85d59/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:50:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:50:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:50:08,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:50:08,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:50:08,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313362394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:50:08,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:50:08,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:50:08,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569095455] [2022-11-03 01:50:08,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:50:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:50:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:50:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:50:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:50:08,139 INFO L87 Difference]: Start difference. First operand 150794 states and 222733 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)