./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0 --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 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 --- 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-e04fb08 [2022-11-16 19:28:21,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:28:21,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:28:21,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:28:21,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:28:21,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:28:21,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:28:21,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:28:21,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:28:21,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:28:21,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:28:21,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:28:21,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:28:21,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:28:21,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:28:21,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:28:21,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:28:21,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:28:21,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:28:21,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:28:21,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:28:21,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:28:21,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:28:21,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:28:21,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:28:21,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:28:21,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:28:21,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:28:21,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:28:21,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:28:21,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:28:21,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:28:21,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:28:21,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:28:21,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:28:21,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:28:21,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:28:21,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:28:21,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:28:21,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:28:21,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:28:21,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:28:21,256 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:28:21,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:28:21,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:28:21,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:28:21,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:28:21,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:28:21,259 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:28:21,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:28:21,260 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:28:21,260 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:28:21,261 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:28:21,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:28:21,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:28:21,262 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:28:21,262 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:28:21,262 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:28:21,262 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:28:21,263 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:28:21,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:28:21,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:28:21,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:28:21,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:28:21,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:28:21,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:28:21,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:28:21,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:28:21,265 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:28:21,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:28:21,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:28:21,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:28:21,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:28:21,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:28:21,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:28:21,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:28:21,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:28:21,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:28:21,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:28:21,268 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:28:21,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:28:21,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:28:21,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:28:21,269 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_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0792bb078b549cb8c62d642eddb09d42b03fb2451c67a454a8e8576be6796f29 [2022-11-16 19:28:21,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:28:21,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:28:21,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:28:21,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:28:21,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:28:21,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-16 19:28:21,725 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/data/bb4ae0a85/81c7e059ffd54ee2a531de5bf88f403b/FLAGa8f7a318e [2022-11-16 19:28:22,254 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:28:22,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-16 19:28:22,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/data/bb4ae0a85/81c7e059ffd54ee2a531de5bf88f403b/FLAGa8f7a318e [2022-11-16 19:28:22,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/data/bb4ae0a85/81c7e059ffd54ee2a531de5bf88f403b [2022-11-16 19:28:22,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:28:22,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:28:22,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:28:22,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:28:22,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:28:22,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:22" (1/1) ... [2022-11-16 19:28:22,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6278aa9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:22, skipping insertion in model container [2022-11-16 19:28:22,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:28:22" (1/1) ... [2022-11-16 19:28:22,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:28:22,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:28:22,883 WARN L229 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_51ce875f-c794-490c-b263-2a3e5871ff07/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2022-11-16 19:28:22,948 WARN L229 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_51ce875f-c794-490c-b263-2a3e5871ff07/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2022-11-16 19:28:23,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:28:23,011 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:28:23,023 WARN L229 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_51ce875f-c794-490c-b263-2a3e5871ff07/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[914,927] [2022-11-16 19:28:23,043 WARN L229 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_51ce875f-c794-490c-b263-2a3e5871ff07/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-1.c[7115,7128] [2022-11-16 19:28:23,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:28:23,092 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:28:23,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23 WrapperNode [2022-11-16 19:28:23,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:28:23,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:28:23,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:28:23,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:28:23,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,184 INFO L138 Inliner]: procedures = 57, calls = 63, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 460 [2022-11-16 19:28:23,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:28:23,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:28:23,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:28:23,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:28:23,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,254 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:28:23,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:28:23,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:28:23,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:28:23,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (1/1) ... [2022-11-16 19:28:23,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:28:23,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:23,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:28:23,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:28:23,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:28:23,364 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 19:28:23,365 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 19:28:23,365 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-16 19:28:23,365 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-16 19:28:23,365 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 19:28:23,366 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 19:28:23,366 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 19:28:23,366 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 19:28:23,366 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-16 19:28:23,366 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-16 19:28:23,366 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 19:28:23,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 19:28:23,367 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 19:28:23,367 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 19:28:23,367 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-16 19:28:23,367 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-16 19:28:23,367 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-16 19:28:23,368 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-16 19:28:23,368 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-16 19:28:23,368 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-16 19:28:23,368 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 19:28:23,368 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 19:28:23,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:28:23,368 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 19:28:23,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 19:28:23,369 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-16 19:28:23,369 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-16 19:28:23,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:28:23,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:28:23,370 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 19:28:23,370 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 19:28:23,525 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:28:23,528 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:28:24,191 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:28:24,433 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:28:24,433 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 19:28:24,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:28:24 BoogieIcfgContainer [2022-11-16 19:28:24,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:28:24,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:28:24,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:28:24,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:28:24,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:28:22" (1/3) ... [2022-11-16 19:28:24,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ac5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:24, skipping insertion in model container [2022-11-16 19:28:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:28:23" (2/3) ... [2022-11-16 19:28:24,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7ac5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:28:24, skipping insertion in model container [2022-11-16 19:28:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:28:24" (3/3) ... [2022-11-16 19:28:24,450 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-1.c [2022-11-16 19:28:24,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:28:24,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 19:28:24,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:28:24,582 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;@2ee4caab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:28:24,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 19:28:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 19:28:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 19:28:24,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:24,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:24,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -808074872, now seen corresponding path program 1 times [2022-11-16 19:28:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469785482] [2022-11-16 19:28:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:25,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:25,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469785482] [2022-11-16 19:28:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469785482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:25,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:25,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:28:25,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168011962] [2022-11-16 19:28:25,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:25,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:28:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:28:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:28:25,203 INFO L87 Difference]: Start difference. First operand has 150 states, 103 states have (on average 1.4854368932038835) internal successors, (153), 109 states have internal predecessors, (153), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:28:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:25,949 INFO L93 Difference]: Finished difference Result 557 states and 823 transitions. [2022-11-16 19:28:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:28:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-16 19:28:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:25,974 INFO L225 Difference]: With dead ends: 557 [2022-11-16 19:28:25,975 INFO L226 Difference]: Without dead ends: 402 [2022-11-16 19:28:25,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:28:25,990 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 537 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:25,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 558 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:28:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-16 19:28:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-11-16 19:28:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 277 states have (on average 1.3754512635379061) internal successors, (381), 284 states have internal predecessors, (381), 75 states have call successors, (75), 38 states have call predecessors, (75), 37 states have return successors, (95), 70 states have call predecessors, (95), 73 states have call successors, (95) [2022-11-16 19:28:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 551 transitions. [2022-11-16 19:28:26,134 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 551 transitions. Word has length 37 [2022-11-16 19:28:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:26,134 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 551 transitions. [2022-11-16 19:28:26,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 19:28:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 551 transitions. [2022-11-16 19:28:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:28:26,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:26,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:26,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:28:26,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1888016936, now seen corresponding path program 1 times [2022-11-16 19:28:26,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:26,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674908283] [2022-11-16 19:28:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:26,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:26,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674908283] [2022-11-16 19:28:26,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674908283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:26,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:26,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:28:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801564683] [2022-11-16 19:28:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:28:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:26,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:28:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:28:26,220 INFO L87 Difference]: Start difference. First operand 391 states and 551 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:28:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:26,458 INFO L93 Difference]: Finished difference Result 515 states and 713 transitions. [2022-11-16 19:28:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:28:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-16 19:28:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:26,462 INFO L225 Difference]: With dead ends: 515 [2022-11-16 19:28:26,462 INFO L226 Difference]: Without dead ends: 451 [2022-11-16 19:28:26,463 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 [2022-11-16 19:28:26,464 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 253 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:26,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 362 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-16 19:28:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 444. [2022-11-16 19:28:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 315 states have (on average 1.3587301587301588) internal successors, (428), 322 states have internal predecessors, (428), 83 states have call successors, (83), 45 states have call predecessors, (83), 44 states have return successors, (103), 78 states have call predecessors, (103), 81 states have call successors, (103) [2022-11-16 19:28:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 614 transitions. [2022-11-16 19:28:26,522 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 614 transitions. Word has length 45 [2022-11-16 19:28:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:26,523 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 614 transitions. [2022-11-16 19:28:26,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:28:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 614 transitions. [2022-11-16 19:28:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:28:26,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:26,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:26,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:28:26,526 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:26,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1487975737, now seen corresponding path program 1 times [2022-11-16 19:28:26,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145162557] [2022-11-16 19:28:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:26,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145162557] [2022-11-16 19:28:26,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145162557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:26,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:26,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:28:26,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202339881] [2022-11-16 19:28:26,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:28:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:28:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:28:26,692 INFO L87 Difference]: Start difference. First operand 444 states and 614 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:28:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:27,336 INFO L93 Difference]: Finished difference Result 846 states and 1117 transitions. [2022-11-16 19:28:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:28:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-16 19:28:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:27,341 INFO L225 Difference]: With dead ends: 846 [2022-11-16 19:28:27,342 INFO L226 Difference]: Without dead ends: 714 [2022-11-16 19:28:27,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:28:27,344 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 588 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:27,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 738 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:28:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-16 19:28:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 630. [2022-11-16 19:28:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 447 states have (on average 1.3154362416107384) internal successors, (588), 455 states have internal predecessors, (588), 110 states have call successors, (110), 68 states have call predecessors, (110), 71 states have return successors, (134), 108 states have call predecessors, (134), 108 states have call successors, (134) [2022-11-16 19:28:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 832 transitions. [2022-11-16 19:28:27,427 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 832 transitions. Word has length 45 [2022-11-16 19:28:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:27,427 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 832 transitions. [2022-11-16 19:28:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 19:28:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 832 transitions. [2022-11-16 19:28:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:28:27,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:27,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:27,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:28:27,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1899068679, now seen corresponding path program 1 times [2022-11-16 19:28:27,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378671417] [2022-11-16 19:28:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:27,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:27,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378671417] [2022-11-16 19:28:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378671417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:27,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:27,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 19:28:27,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375553818] [2022-11-16 19:28:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:27,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:28:27,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:28:27,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:28:27,690 INFO L87 Difference]: Start difference. First operand 630 states and 832 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 19:28:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:28,372 INFO L93 Difference]: Finished difference Result 1146 states and 1448 transitions. [2022-11-16 19:28:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:28:28,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-16 19:28:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:28,382 INFO L225 Difference]: With dead ends: 1146 [2022-11-16 19:28:28,382 INFO L226 Difference]: Without dead ends: 844 [2022-11-16 19:28:28,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:28:28,395 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 304 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:28,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 592 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:28:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-11-16 19:28:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 809. [2022-11-16 19:28:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 572 states have (on average 1.2937062937062938) internal successors, (740), 581 states have internal predecessors, (740), 137 states have call successors, (137), 91 states have call predecessors, (137), 98 states have return successors, (165), 138 states have call predecessors, (165), 135 states have call successors, (165) [2022-11-16 19:28:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1042 transitions. [2022-11-16 19:28:28,533 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1042 transitions. Word has length 46 [2022-11-16 19:28:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:28,534 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1042 transitions. [2022-11-16 19:28:28,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 19:28:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1042 transitions. [2022-11-16 19:28:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 19:28:28,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:28,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:28:28,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -575147253, now seen corresponding path program 1 times [2022-11-16 19:28:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:28,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983723004] [2022-11-16 19:28:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:28,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:28,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983723004] [2022-11-16 19:28:28,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983723004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:28,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:28,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:28,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374965291] [2022-11-16 19:28:28,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:28,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:28,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:28,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:28,602 INFO L87 Difference]: Start difference. First operand 809 states and 1042 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:28:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:28,787 INFO L93 Difference]: Finished difference Result 1373 states and 1712 transitions. [2022-11-16 19:28:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-16 19:28:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:28,793 INFO L225 Difference]: With dead ends: 1373 [2022-11-16 19:28:28,793 INFO L226 Difference]: Without dead ends: 941 [2022-11-16 19:28:28,794 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 [2022-11-16 19:28:28,795 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 67 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:28,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 320 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-16 19:28:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 836. [2022-11-16 19:28:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 595 states have (on average 1.2857142857142858) internal successors, (765), 604 states have internal predecessors, (765), 139 states have call successors, (139), 93 states have call predecessors, (139), 100 states have return successors, (167), 140 states have call predecessors, (167), 137 states have call successors, (167) [2022-11-16 19:28:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1071 transitions. [2022-11-16 19:28:28,883 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1071 transitions. Word has length 47 [2022-11-16 19:28:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:28,884 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1071 transitions. [2022-11-16 19:28:28,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:28:28,884 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1071 transitions. [2022-11-16 19:28:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 19:28:28,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:28,886 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:28:28,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1970670378, now seen corresponding path program 1 times [2022-11-16 19:28:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480124027] [2022-11-16 19:28:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:28:28,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480124027] [2022-11-16 19:28:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480124027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:28,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:28,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795229974] [2022-11-16 19:28:28,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:28,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:28,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:28,934 INFO L87 Difference]: Start difference. First operand 836 states and 1071 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:28:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:29,076 INFO L93 Difference]: Finished difference Result 1026 states and 1292 transitions. [2022-11-16 19:28:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-16 19:28:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:29,082 INFO L225 Difference]: With dead ends: 1026 [2022-11-16 19:28:29,082 INFO L226 Difference]: Without dead ends: 753 [2022-11-16 19:28:29,083 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 [2022-11-16 19:28:29,085 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 166 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:29,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 238 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-11-16 19:28:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 644. [2022-11-16 19:28:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 455 states have (on average 1.2813186813186814) internal successors, (583), 462 states have internal predecessors, (583), 115 states have call successors, (115), 73 states have call predecessors, (115), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2022-11-16 19:28:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 833 transitions. [2022-11-16 19:28:29,149 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 833 transitions. Word has length 53 [2022-11-16 19:28:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:29,150 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 833 transitions. [2022-11-16 19:28:29,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:28:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 833 transitions. [2022-11-16 19:28:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 19:28:29,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:29,152 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:29,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 19:28:29,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1104131365, now seen corresponding path program 1 times [2022-11-16 19:28:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201276764] [2022-11-16 19:28:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:29,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:29,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201276764] [2022-11-16 19:28:29,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201276764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:29,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:29,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:28:29,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072889383] [2022-11-16 19:28:29,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:29,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:28:29,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:28:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:28:29,257 INFO L87 Difference]: Start difference. First operand 644 states and 833 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 19:28:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:29,523 INFO L93 Difference]: Finished difference Result 747 states and 949 transitions. [2022-11-16 19:28:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:28:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-16 19:28:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:29,528 INFO L225 Difference]: With dead ends: 747 [2022-11-16 19:28:29,528 INFO L226 Difference]: Without dead ends: 744 [2022-11-16 19:28:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:28:29,529 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 309 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 214 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-11-16 19:28:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 643. [2022-11-16 19:28:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 455 states have (on average 1.2747252747252746) internal successors, (580), 461 states have internal predecessors, (580), 114 states have call successors, (114), 73 states have call predecessors, (114), 72 states have return successors, (135), 110 states have call predecessors, (135), 113 states have call successors, (135) [2022-11-16 19:28:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 829 transitions. [2022-11-16 19:28:29,627 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 829 transitions. Word has length 54 [2022-11-16 19:28:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:29,628 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 829 transitions. [2022-11-16 19:28:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 19:28:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 829 transitions. [2022-11-16 19:28:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 19:28:29,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:29,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:29,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 19:28:29,631 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash -132366092, now seen corresponding path program 1 times [2022-11-16 19:28:29,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475647600] [2022-11-16 19:28:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:29,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:29,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475647600] [2022-11-16 19:28:29,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475647600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:29,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836758020] [2022-11-16 19:28:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:29,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:29,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:29,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:28:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:28:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:30,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:28:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:30,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836758020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:28:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2059775146] [2022-11-16 19:28:30,514 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-16 19:28:30,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:28:30,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:28:30,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:28:30,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:28:32,842 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 105 for LOIs [2022-11-16 19:28:32,862 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 73 for LOIs [2022-11-16 19:28:32,869 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 101 for LOIs [2022-11-16 19:28:32,885 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 109 for LOIs [2022-11-16 19:28:33,215 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 105 for LOIs [2022-11-16 19:28:33,258 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 105 for LOIs [2022-11-16 19:28:33,301 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 105 for LOIs [2022-11-16 19:28:33,320 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 112 for LOIs [2022-11-16 19:28:33,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:28:43,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16230#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:28:43,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:28:43,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:28:43,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-16 19:28:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206080377] [2022-11-16 19:28:43,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:28:43,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:28:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:28:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:28:43,603 INFO L87 Difference]: Start difference. First operand 643 states and 829 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:28:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:44,190 INFO L93 Difference]: Finished difference Result 1216 states and 1484 transitions. [2022-11-16 19:28:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:28:44,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-16 19:28:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:44,197 INFO L225 Difference]: With dead ends: 1216 [2022-11-16 19:28:44,198 INFO L226 Difference]: Without dead ends: 1213 [2022-11-16 19:28:44,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 19:28:44,200 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 557 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:44,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 642 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:28:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-11-16 19:28:44,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 938. [2022-11-16 19:28:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 660 states have (on average 1.246969696969697) internal successors, (823), 666 states have internal predecessors, (823), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2022-11-16 19:28:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1168 transitions. [2022-11-16 19:28:44,364 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1168 transitions. Word has length 55 [2022-11-16 19:28:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:44,365 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1168 transitions. [2022-11-16 19:28:44,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-16 19:28:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1168 transitions. [2022-11-16 19:28:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 19:28:44,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:44,369 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:44,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:44,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:28:44,575 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1431704731, now seen corresponding path program 2 times [2022-11-16 19:28:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308060675] [2022-11-16 19:28:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:28:44,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:44,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308060675] [2022-11-16 19:28:44,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308060675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:44,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:44,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:44,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183425397] [2022-11-16 19:28:44,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:44,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:44,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:44,617 INFO L87 Difference]: Start difference. First operand 938 states and 1168 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 19:28:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:44,800 INFO L93 Difference]: Finished difference Result 1351 states and 1641 transitions. [2022-11-16 19:28:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-16 19:28:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:44,805 INFO L225 Difference]: With dead ends: 1351 [2022-11-16 19:28:44,806 INFO L226 Difference]: Without dead ends: 940 [2022-11-16 19:28:44,809 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 [2022-11-16 19:28:44,812 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 169 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:44,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 271 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-11-16 19:28:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 934. [2022-11-16 19:28:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 656 states have (on average 1.236280487804878) internal successors, (811), 662 states have internal predecessors, (811), 162 states have call successors, (162), 115 states have call predecessors, (162), 114 states have return successors, (183), 158 states have call predecessors, (183), 161 states have call successors, (183) [2022-11-16 19:28:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1156 transitions. [2022-11-16 19:28:44,946 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1156 transitions. Word has length 58 [2022-11-16 19:28:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:44,946 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1156 transitions. [2022-11-16 19:28:44,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 19:28:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1156 transitions. [2022-11-16 19:28:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 19:28:44,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:44,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:44,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:28:44,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -921541998, now seen corresponding path program 1 times [2022-11-16 19:28:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534441736] [2022-11-16 19:28:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:28:44,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:44,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534441736] [2022-11-16 19:28:45,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534441736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:45,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:45,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675971402] [2022-11-16 19:28:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:45,002 INFO L87 Difference]: Start difference. First operand 934 states and 1156 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:45,219 INFO L93 Difference]: Finished difference Result 1553 states and 1866 transitions. [2022-11-16 19:28:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-16 19:28:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:45,225 INFO L225 Difference]: With dead ends: 1553 [2022-11-16 19:28:45,226 INFO L226 Difference]: Without dead ends: 1190 [2022-11-16 19:28:45,227 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 [2022-11-16 19:28:45,228 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 42 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:45,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 356 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:45,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-16 19:28:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1009. [2022-11-16 19:28:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 717 states have (on average 1.2357043235704324) internal successors, (886), 723 states have internal predecessors, (886), 169 states have call successors, (169), 122 states have call predecessors, (169), 121 states have return successors, (190), 165 states have call predecessors, (190), 168 states have call successors, (190) [2022-11-16 19:28:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1245 transitions. [2022-11-16 19:28:45,362 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1245 transitions. Word has length 61 [2022-11-16 19:28:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:45,362 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1245 transitions. [2022-11-16 19:28:45,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1245 transitions. [2022-11-16 19:28:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 19:28:45,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:45,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:45,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:28:45,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:45,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:45,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1333162197, now seen corresponding path program 1 times [2022-11-16 19:28:45,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:45,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000557062] [2022-11-16 19:28:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:45,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:28:45,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:45,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000557062] [2022-11-16 19:28:45,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000557062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:45,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:45,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:28:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455861613] [2022-11-16 19:28:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:28:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:45,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:28:45,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:28:45,613 INFO L87 Difference]: Start difference. First operand 1009 states and 1245 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:28:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:46,163 INFO L93 Difference]: Finished difference Result 1641 states and 2183 transitions. [2022-11-16 19:28:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:28:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-11-16 19:28:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:46,171 INFO L225 Difference]: With dead ends: 1641 [2022-11-16 19:28:46,171 INFO L226 Difference]: Without dead ends: 1325 [2022-11-16 19:28:46,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:28:46,173 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 303 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:46,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 447 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:28:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-11-16 19:28:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1293. [2022-11-16 19:28:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 919 states have (on average 1.2557127312295975) internal successors, (1154), 928 states have internal predecessors, (1154), 221 states have call successors, (221), 152 states have call predecessors, (221), 151 states have return successors, (260), 214 states have call predecessors, (260), 220 states have call successors, (260) [2022-11-16 19:28:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1635 transitions. [2022-11-16 19:28:46,374 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1635 transitions. Word has length 66 [2022-11-16 19:28:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1635 transitions. [2022-11-16 19:28:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:28:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1635 transitions. [2022-11-16 19:28:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 19:28:46,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:46,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:46,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 19:28:46,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1507808166, now seen corresponding path program 1 times [2022-11-16 19:28:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:46,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833851011] [2022-11-16 19:28:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:46,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:28:46,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833851011] [2022-11-16 19:28:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833851011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:46,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:46,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:46,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58700257] [2022-11-16 19:28:46,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:46,432 INFO L87 Difference]: Start difference. First operand 1293 states and 1635 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:46,696 INFO L93 Difference]: Finished difference Result 1912 states and 2534 transitions. [2022-11-16 19:28:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-16 19:28:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:46,704 INFO L225 Difference]: With dead ends: 1912 [2022-11-16 19:28:46,704 INFO L226 Difference]: Without dead ends: 1430 [2022-11-16 19:28:46,706 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 [2022-11-16 19:28:46,707 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 37 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:46,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 361 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-16 19:28:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1351. [2022-11-16 19:28:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 969 states have (on average 1.2714138286893706) internal successors, (1232), 978 states have internal predecessors, (1232), 225 states have call successors, (225), 156 states have call predecessors, (225), 155 states have return successors, (264), 218 states have call predecessors, (264), 224 states have call successors, (264) [2022-11-16 19:28:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 1721 transitions. [2022-11-16 19:28:46,894 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 1721 transitions. Word has length 67 [2022-11-16 19:28:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:46,895 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 1721 transitions. [2022-11-16 19:28:46,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 1721 transitions. [2022-11-16 19:28:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 19:28:46,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:46,898 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:28:46,898 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:46,900 INFO L85 PathProgramCache]: Analyzing trace with hash -923777638, now seen corresponding path program 1 times [2022-11-16 19:28:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:46,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434406051] [2022-11-16 19:28:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:28:47,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:47,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434406051] [2022-11-16 19:28:47,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434406051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:47,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:47,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 19:28:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039789700] [2022-11-16 19:28:47,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:47,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:28:47,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:28:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:28:47,097 INFO L87 Difference]: Start difference. First operand 1351 states and 1721 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:28:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:47,935 INFO L93 Difference]: Finished difference Result 2400 states and 2904 transitions. [2022-11-16 19:28:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:28:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-16 19:28:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:47,944 INFO L225 Difference]: With dead ends: 2400 [2022-11-16 19:28:47,944 INFO L226 Difference]: Without dead ends: 1719 [2022-11-16 19:28:47,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:28:47,948 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 286 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:47,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 574 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:28:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-16 19:28:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1670. [2022-11-16 19:28:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1183 states have (on average 1.2409129332206255) internal successors, (1468), 1192 states have internal predecessors, (1468), 281 states have call successors, (281), 205 states have call predecessors, (281), 204 states have return successors, (320), 274 states have call predecessors, (320), 280 states have call successors, (320) [2022-11-16 19:28:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2069 transitions. [2022-11-16 19:28:48,295 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2069 transitions. Word has length 70 [2022-11-16 19:28:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:48,295 INFO L495 AbstractCegarLoop]: Abstraction has 1670 states and 2069 transitions. [2022-11-16 19:28:48,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 19:28:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2069 transitions. [2022-11-16 19:28:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 19:28:48,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:48,299 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:48,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 19:28:48,299 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash -412529439, now seen corresponding path program 1 times [2022-11-16 19:28:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606147957] [2022-11-16 19:28:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:48,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:28:48,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606147957] [2022-11-16 19:28:48,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606147957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:48,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:48,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859980902] [2022-11-16 19:28:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:48,353 INFO L87 Difference]: Start difference. First operand 1670 states and 2069 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:48,702 INFO L93 Difference]: Finished difference Result 2636 states and 3163 transitions. [2022-11-16 19:28:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-16 19:28:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:48,714 INFO L225 Difference]: With dead ends: 2636 [2022-11-16 19:28:48,714 INFO L226 Difference]: Without dead ends: 1846 [2022-11-16 19:28:48,716 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 [2022-11-16 19:28:48,717 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 37 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:48,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 350 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-11-16 19:28:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1717. [2022-11-16 19:28:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1222 states have (on average 1.2389525368248773) internal successors, (1514), 1231 states have internal predecessors, (1514), 285 states have call successors, (285), 209 states have call predecessors, (285), 208 states have return successors, (324), 278 states have call predecessors, (324), 284 states have call successors, (324) [2022-11-16 19:28:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2123 transitions. [2022-11-16 19:28:49,053 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2123 transitions. Word has length 71 [2022-11-16 19:28:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:49,054 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2123 transitions. [2022-11-16 19:28:49,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 19:28:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2123 transitions. [2022-11-16 19:28:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 19:28:49,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:49,058 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:28:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 19:28:49,058 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -819604455, now seen corresponding path program 1 times [2022-11-16 19:28:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63459274] [2022-11-16 19:28:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 19:28:49,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63459274] [2022-11-16 19:28:49,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63459274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:49,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:49,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:28:49,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609518942] [2022-11-16 19:28:49,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:49,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:49,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:28:49,121 INFO L87 Difference]: Start difference. First operand 1717 states and 2123 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:28:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:49,497 INFO L93 Difference]: Finished difference Result 2703 states and 3543 transitions. [2022-11-16 19:28:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2022-11-16 19:28:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:49,507 INFO L225 Difference]: With dead ends: 2703 [2022-11-16 19:28:49,508 INFO L226 Difference]: Without dead ends: 2044 [2022-11-16 19:28:49,512 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 [2022-11-16 19:28:49,514 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 160 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:49,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 265 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2022-11-16 19:28:49,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2035. [2022-11-16 19:28:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 1454 states have (on average 1.251031636863824) internal successors, (1819), 1466 states have internal predecessors, (1819), 339 states have call successors, (339), 241 states have call predecessors, (339), 240 states have return successors, (396), 329 states have call predecessors, (396), 338 states have call successors, (396) [2022-11-16 19:28:49,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 2554 transitions. [2022-11-16 19:28:49,872 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 2554 transitions. Word has length 86 [2022-11-16 19:28:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:49,872 INFO L495 AbstractCegarLoop]: Abstraction has 2035 states and 2554 transitions. [2022-11-16 19:28:49,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:28:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 2554 transitions. [2022-11-16 19:28:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:28:49,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:49,877 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 19:28:49,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1348630585, now seen corresponding path program 1 times [2022-11-16 19:28:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:49,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600758078] [2022-11-16 19:28:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:49,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 19:28:50,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600758078] [2022-11-16 19:28:50,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600758078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755896235] [2022-11-16 19:28:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:50,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:50,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:50,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:28:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:28:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:28:50,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:50,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755896235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:50,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:50,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-16 19:28:50,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12933347] [2022-11-16 19:28:50,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:50,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:28:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:50,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:28:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:28:50,487 INFO L87 Difference]: Start difference. First operand 2035 states and 2554 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 19:28:51,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:51,023 INFO L93 Difference]: Finished difference Result 2899 states and 3559 transitions. [2022-11-16 19:28:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:28:51,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-16 19:28:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:51,033 INFO L225 Difference]: With dead ends: 2899 [2022-11-16 19:28:51,033 INFO L226 Difference]: Without dead ends: 1852 [2022-11-16 19:28:51,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:28:51,036 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 164 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:51,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 765 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-16 19:28:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1667. [2022-11-16 19:28:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1217 states have (on average 1.2728019720624486) internal successors, (1549), 1229 states have internal predecessors, (1549), 268 states have call successors, (268), 181 states have call predecessors, (268), 180 states have return successors, (325), 258 states have call predecessors, (325), 267 states have call successors, (325) [2022-11-16 19:28:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2142 transitions. [2022-11-16 19:28:51,302 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2142 transitions. Word has length 102 [2022-11-16 19:28:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:51,303 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2142 transitions. [2022-11-16 19:28:51,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 19:28:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2142 transitions. [2022-11-16 19:28:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 19:28:51,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:51,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:51,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:51,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:51,516 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1575000988, now seen corresponding path program 1 times [2022-11-16 19:28:51,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:51,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314415304] [2022-11-16 19:28:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:51,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:28:51,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314415304] [2022-11-16 19:28:51,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314415304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371127738] [2022-11-16 19:28:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:51,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:51,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:28:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:51,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:28:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:28:51,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:51,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371127738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:51,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:51,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:28:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241325371] [2022-11-16 19:28:51,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:28:51,783 INFO L87 Difference]: Start difference. First operand 1667 states and 2142 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:28:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:52,090 INFO L93 Difference]: Finished difference Result 2550 states and 3401 transitions. [2022-11-16 19:28:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:52,090 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 98 [2022-11-16 19:28:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:52,099 INFO L225 Difference]: With dead ends: 2550 [2022-11-16 19:28:52,100 INFO L226 Difference]: Without dead ends: 1892 [2022-11-16 19:28:52,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:28:52,103 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 51 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:52,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 369 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-11-16 19:28:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1757. [2022-11-16 19:28:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1293 states have (on average 1.2892498066511988) internal successors, (1667), 1305 states have internal predecessors, (1667), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2022-11-16 19:28:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2274 transitions. [2022-11-16 19:28:52,382 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2274 transitions. Word has length 98 [2022-11-16 19:28:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:52,383 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2274 transitions. [2022-11-16 19:28:52,383 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:28:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2274 transitions. [2022-11-16 19:28:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 19:28:52,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:52,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:52,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:52,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:28:52,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:52,594 INFO L85 PathProgramCache]: Analyzing trace with hash 888908188, now seen corresponding path program 2 times [2022-11-16 19:28:52,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:52,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865085490] [2022-11-16 19:28:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:52,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 19:28:52,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865085490] [2022-11-16 19:28:52,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865085490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:52,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803453786] [2022-11-16 19:28:52,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:28:52,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:52,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:52,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:28:52,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:28:52,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:28:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:28:52,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:28:52,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803453786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:52,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:52,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:28:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303066493] [2022-11-16 19:28:52,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:28:52,972 INFO L87 Difference]: Start difference. First operand 1757 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:53,306 INFO L93 Difference]: Finished difference Result 2512 states and 3427 transitions. [2022-11-16 19:28:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2022-11-16 19:28:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:53,315 INFO L225 Difference]: With dead ends: 2512 [2022-11-16 19:28:53,315 INFO L226 Difference]: Without dead ends: 1764 [2022-11-16 19:28:53,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:28:53,318 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 82 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:53,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 362 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-11-16 19:28:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1753. [2022-11-16 19:28:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1289 states have (on average 1.2715283165244375) internal successors, (1639), 1301 states have internal predecessors, (1639), 275 states have call successors, (275), 188 states have call predecessors, (275), 187 states have return successors, (332), 265 states have call predecessors, (332), 274 states have call successors, (332) [2022-11-16 19:28:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2246 transitions. [2022-11-16 19:28:53,592 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2246 transitions. Word has length 98 [2022-11-16 19:28:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2246 transitions. [2022-11-16 19:28:53,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2246 transitions. [2022-11-16 19:28:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-16 19:28:53,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:53,598 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:28:53,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:53,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 19:28:53,804 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1911878498, now seen corresponding path program 1 times [2022-11-16 19:28:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:53,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258133092] [2022-11-16 19:28:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 19:28:54,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258133092] [2022-11-16 19:28:54,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258133092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702523743] [2022-11-16 19:28:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:54,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:54,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:54,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:54,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:28:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:28:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:28:54,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:54,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702523743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:54,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:54,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-16 19:28:54,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601467029] [2022-11-16 19:28:54,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:28:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:28:54,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:28:54,218 INFO L87 Difference]: Start difference. First operand 1753 states and 2246 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:54,686 INFO L93 Difference]: Finished difference Result 3306 states and 4398 transitions. [2022-11-16 19:28:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:28:54,687 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2022-11-16 19:28:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:54,697 INFO L225 Difference]: With dead ends: 3306 [2022-11-16 19:28:54,697 INFO L226 Difference]: Without dead ends: 2244 [2022-11-16 19:28:54,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:28:54,702 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 41 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:54,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 331 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-16 19:28:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1913. [2022-11-16 19:28:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1421 states have (on average 1.2864180154820548) internal successors, (1828), 1434 states have internal predecessors, (1828), 289 states have call successors, (289), 202 states have call predecessors, (289), 201 states have return successors, (346), 278 states have call predecessors, (346), 288 states have call successors, (346) [2022-11-16 19:28:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2463 transitions. [2022-11-16 19:28:55,006 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2463 transitions. Word has length 98 [2022-11-16 19:28:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:55,007 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 2463 transitions. [2022-11-16 19:28:55,007 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, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2463 transitions. [2022-11-16 19:28:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-16 19:28:55,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:55,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:55,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:55,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:55,218 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1146711925, now seen corresponding path program 1 times [2022-11-16 19:28:55,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:55,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097174725] [2022-11-16 19:28:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:55,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 19:28:55,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097174725] [2022-11-16 19:28:55,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097174725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:55,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568726291] [2022-11-16 19:28:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:55,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:55,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:55,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:55,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:28:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:28:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:28:55,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568726291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:55,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:55,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-11-16 19:28:55,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023885914] [2022-11-16 19:28:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:55,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:28:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:28:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:28:55,593 INFO L87 Difference]: Start difference. First operand 1913 states and 2463 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:28:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:56,254 INFO L93 Difference]: Finished difference Result 3785 states and 5009 transitions. [2022-11-16 19:28:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:28:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 99 [2022-11-16 19:28:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:56,267 INFO L225 Difference]: With dead ends: 3785 [2022-11-16 19:28:56,268 INFO L226 Difference]: Without dead ends: 2563 [2022-11-16 19:28:56,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:28:56,273 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 312 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:56,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 366 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-11-16 19:28:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2561. [2022-11-16 19:28:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 1892 states have (on average 1.2684989429175475) internal successors, (2400), 1911 states have internal predecessors, (2400), 397 states have call successors, (397), 271 states have call predecessors, (397), 270 states have return successors, (493), 380 states have call predecessors, (493), 396 states have call successors, (493) [2022-11-16 19:28:56,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3290 transitions. [2022-11-16 19:28:56,680 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3290 transitions. Word has length 99 [2022-11-16 19:28:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:56,681 INFO L495 AbstractCegarLoop]: Abstraction has 2561 states and 3290 transitions. [2022-11-16 19:28:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 19:28:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3290 transitions. [2022-11-16 19:28:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:28:56,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:56,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:56,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:28:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:56,893 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1210134155, now seen corresponding path program 1 times [2022-11-16 19:28:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921675691] [2022-11-16 19:28:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:56,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 19:28:56,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921675691] [2022-11-16 19:28:56,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921675691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:56,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:56,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:28:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229536434] [2022-11-16 19:28:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:28:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:28:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:28:56,959 INFO L87 Difference]: Start difference. First operand 2561 states and 3290 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:57,546 INFO L93 Difference]: Finished difference Result 4284 states and 5687 transitions. [2022-11-16 19:28:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:28:57,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2022-11-16 19:28:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:57,573 INFO L225 Difference]: With dead ends: 4284 [2022-11-16 19:28:57,573 INFO L226 Difference]: Without dead ends: 2902 [2022-11-16 19:28:57,578 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 [2022-11-16 19:28:57,578 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 193 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:57,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 292 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:28:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2022-11-16 19:28:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2846. [2022-11-16 19:28:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 2139 states have (on average 1.2538569424964936) internal successors, (2682), 2155 states have internal predecessors, (2682), 403 states have call successors, (403), 301 states have call predecessors, (403), 302 states have return successors, (498), 391 states have call predecessors, (498), 402 states have call successors, (498) [2022-11-16 19:28:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 3583 transitions. [2022-11-16 19:28:58,084 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 3583 transitions. Word has length 102 [2022-11-16 19:28:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:58,085 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 3583 transitions. [2022-11-16 19:28:58,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:28:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 3583 transitions. [2022-11-16 19:28:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:28:58,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:58,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:58,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 19:28:58,094 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1990115084, now seen corresponding path program 2 times [2022-11-16 19:28:58,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:58,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58509914] [2022-11-16 19:28:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 19:28:58,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:58,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58509914] [2022-11-16 19:28:58,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58509914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:58,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:28:58,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:28:58,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423794931] [2022-11-16 19:28:58,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:58,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:28:58,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:28:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:28:58,163 INFO L87 Difference]: Start difference. First operand 2846 states and 3583 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:28:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:28:58,867 INFO L93 Difference]: Finished difference Result 4835 states and 6323 transitions. [2022-11-16 19:28:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:28:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2022-11-16 19:28:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:28:58,886 INFO L225 Difference]: With dead ends: 4835 [2022-11-16 19:28:58,886 INFO L226 Difference]: Without dead ends: 3247 [2022-11-16 19:28:58,892 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 [2022-11-16 19:28:58,893 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 247 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:28:58,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 371 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:28:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-11-16 19:28:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2618. [2022-11-16 19:28:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 1965 states have (on average 1.2183206106870228) internal successors, (2394), 1981 states have internal predecessors, (2394), 372 states have call successors, (372), 280 states have call predecessors, (372), 279 states have return successors, (418), 358 states have call predecessors, (418), 371 states have call successors, (418) [2022-11-16 19:28:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3184 transitions. [2022-11-16 19:28:59,267 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3184 transitions. Word has length 102 [2022-11-16 19:28:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:28:59,267 INFO L495 AbstractCegarLoop]: Abstraction has 2618 states and 3184 transitions. [2022-11-16 19:28:59,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:28:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3184 transitions. [2022-11-16 19:28:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 19:28:59,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:28:59,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:28:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 19:28:59,275 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:28:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:28:59,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1457570784, now seen corresponding path program 1 times [2022-11-16 19:28:59,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:28:59,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235870489] [2022-11-16 19:28:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:59,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:28:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 19:28:59,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:28:59,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235870489] [2022-11-16 19:28:59,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235870489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:28:59,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544786173] [2022-11-16 19:28:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:28:59,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:28:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:28:59,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:28:59,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:28:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:28:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:28:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:28:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 19:28:59,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:28:59,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544786173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:28:59,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:28:59,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-16 19:28:59,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263245044] [2022-11-16 19:28:59,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:28:59,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:28:59,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:28:59,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:28:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:28:59,558 INFO L87 Difference]: Start difference. First operand 2618 states and 3184 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 19:29:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:00,011 INFO L93 Difference]: Finished difference Result 3781 states and 4631 transitions. [2022-11-16 19:29:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:29:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 103 [2022-11-16 19:29:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:00,020 INFO L225 Difference]: With dead ends: 3781 [2022-11-16 19:29:00,021 INFO L226 Difference]: Without dead ends: 2687 [2022-11-16 19:29:00,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:29:00,047 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 171 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:00,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 511 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:29:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2022-11-16 19:29:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2529. [2022-11-16 19:29:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1889 states have (on average 1.216516675489677) internal successors, (2298), 1902 states have internal predecessors, (2298), 367 states have call successors, (367), 272 states have call predecessors, (367), 271 states have return successors, (407), 356 states have call predecessors, (407), 366 states have call successors, (407) [2022-11-16 19:29:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3072 transitions. [2022-11-16 19:29:00,474 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3072 transitions. Word has length 103 [2022-11-16 19:29:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:00,475 INFO L495 AbstractCegarLoop]: Abstraction has 2529 states and 3072 transitions. [2022-11-16 19:29:00,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 19:29:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3072 transitions. [2022-11-16 19:29:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 19:29:00,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:00,480 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:29:00,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 19:29:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:29:00,690 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -148940730, now seen corresponding path program 1 times [2022-11-16 19:29:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316376759] [2022-11-16 19:29:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-16 19:29:00,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316376759] [2022-11-16 19:29:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316376759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354909104] [2022-11-16 19:29:00,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:00,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:00,860 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:00,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:29:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:29:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:29:01,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:29:01,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354909104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:01,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:29:01,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-16 19:29:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736017547] [2022-11-16 19:29:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:29:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:29:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:29:01,044 INFO L87 Difference]: Start difference. First operand 2529 states and 3072 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:29:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:01,488 INFO L93 Difference]: Finished difference Result 4089 states and 5078 transitions. [2022-11-16 19:29:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:29:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2022-11-16 19:29:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:01,496 INFO L225 Difference]: With dead ends: 4089 [2022-11-16 19:29:01,497 INFO L226 Difference]: Without dead ends: 2834 [2022-11-16 19:29:01,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:29:01,501 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 151 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:01,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 204 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:29:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-11-16 19:29:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2798. [2022-11-16 19:29:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2132 states have (on average 1.1955909943714822) internal successors, (2549), 2145 states have internal predecessors, (2549), 369 states have call successors, (369), 296 states have call predecessors, (369), 295 states have return successors, (439), 358 states have call predecessors, (439), 368 states have call successors, (439) [2022-11-16 19:29:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3357 transitions. [2022-11-16 19:29:01,836 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3357 transitions. Word has length 104 [2022-11-16 19:29:01,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:01,837 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 3357 transitions. [2022-11-16 19:29:01,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:29:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3357 transitions. [2022-11-16 19:29:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 19:29:01,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:01,842 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:29:01,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:02,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:02,048 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:02,049 INFO L85 PathProgramCache]: Analyzing trace with hash 764258265, now seen corresponding path program 1 times [2022-11-16 19:29:02,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:02,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563463024] [2022-11-16 19:29:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 19:29:02,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563463024] [2022-11-16 19:29:02,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563463024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698986852] [2022-11-16 19:29:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:02,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:02,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:29:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:02,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:29:02,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:29:02,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:29:02,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698986852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:02,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:29:02,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:29:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342720160] [2022-11-16 19:29:02,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:02,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:29:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:29:02,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:29:02,297 INFO L87 Difference]: Start difference. First operand 2798 states and 3357 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:29:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:02,901 INFO L93 Difference]: Finished difference Result 4302 states and 5249 transitions. [2022-11-16 19:29:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:29:02,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2022-11-16 19:29:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:02,912 INFO L225 Difference]: With dead ends: 4302 [2022-11-16 19:29:02,913 INFO L226 Difference]: Without dead ends: 3176 [2022-11-16 19:29:02,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:29:02,917 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 42 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:02,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 363 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:29:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2022-11-16 19:29:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2966. [2022-11-16 19:29:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2268 states have (on average 1.2032627865961198) internal successors, (2729), 2281 states have internal predecessors, (2729), 385 states have call successors, (385), 312 states have call predecessors, (385), 311 states have return successors, (455), 374 states have call predecessors, (455), 384 states have call successors, (455) [2022-11-16 19:29:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 3569 transitions. [2022-11-16 19:29:03,479 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 3569 transitions. Word has length 101 [2022-11-16 19:29:03,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:03,480 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 3569 transitions. [2022-11-16 19:29:03,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 19:29:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 3569 transitions. [2022-11-16 19:29:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 19:29:03,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:03,485 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 19:29:03,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:03,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:03,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:03,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:03,691 INFO L85 PathProgramCache]: Analyzing trace with hash 821191965, now seen corresponding path program 1 times [2022-11-16 19:29:03,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:03,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725270854] [2022-11-16 19:29:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:03,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 19:29:03,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725270854] [2022-11-16 19:29:03,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725270854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445542594] [2022-11-16 19:29:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:03,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:03,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:03,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:03,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:29:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:29:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 19:29:04,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:29:04,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445542594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:04,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:29:04,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-16 19:29:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822212857] [2022-11-16 19:29:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:29:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:29:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:29:04,115 INFO L87 Difference]: Start difference. First operand 2966 states and 3569 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 19:29:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:04,763 INFO L93 Difference]: Finished difference Result 5666 states and 6888 transitions. [2022-11-16 19:29:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:29:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2022-11-16 19:29:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:04,776 INFO L225 Difference]: With dead ends: 5666 [2022-11-16 19:29:04,776 INFO L226 Difference]: Without dead ends: 3734 [2022-11-16 19:29:04,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:29:04,781 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 272 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:04,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 298 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:29:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3734 states. [2022-11-16 19:29:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3734 to 3300. [2022-11-16 19:29:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 2563 states have (on average 1.187670698400312) internal successors, (3044), 2581 states have internal predecessors, (3044), 394 states have call successors, (394), 335 states have call predecessors, (394), 341 states have return successors, (471), 385 states have call predecessors, (471), 393 states have call successors, (471) [2022-11-16 19:29:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 3909 transitions. [2022-11-16 19:29:05,382 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 3909 transitions. Word has length 102 [2022-11-16 19:29:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:05,383 INFO L495 AbstractCegarLoop]: Abstraction has 3300 states and 3909 transitions. [2022-11-16 19:29:05,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 19:29:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 3909 transitions. [2022-11-16 19:29:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 19:29:05,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:05,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:05,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:29:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 19:29:05,595 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:05,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash -868612127, now seen corresponding path program 1 times [2022-11-16 19:29:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:05,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426907670] [2022-11-16 19:29:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:05,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:29:05,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:05,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426907670] [2022-11-16 19:29:05,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426907670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:05,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:29:05,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:29:05,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858281321] [2022-11-16 19:29:05,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:29:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:29:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:29:05,769 INFO L87 Difference]: Start difference. First operand 3300 states and 3909 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:29:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:06,758 INFO L93 Difference]: Finished difference Result 7231 states and 8642 transitions. [2022-11-16 19:29:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:29:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2022-11-16 19:29:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:06,770 INFO L225 Difference]: With dead ends: 7231 [2022-11-16 19:29:06,770 INFO L226 Difference]: Without dead ends: 4100 [2022-11-16 19:29:06,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:29:06,784 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 104 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:06,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 404 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:29:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-11-16 19:29:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3999. [2022-11-16 19:29:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3084 states have (on average 1.177367055771725) internal successors, (3631), 3108 states have internal predecessors, (3631), 494 states have call successors, (494), 417 states have call predecessors, (494), 419 states have return successors, (600), 475 states have call predecessors, (600), 493 states have call successors, (600) [2022-11-16 19:29:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 4725 transitions. [2022-11-16 19:29:07,354 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 4725 transitions. Word has length 103 [2022-11-16 19:29:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:07,354 INFO L495 AbstractCegarLoop]: Abstraction has 3999 states and 4725 transitions. [2022-11-16 19:29:07,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 19:29:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 4725 transitions. [2022-11-16 19:29:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 19:29:07,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:07,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 19:29:07,363 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -56060095, now seen corresponding path program 1 times [2022-11-16 19:29:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:07,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205291432] [2022-11-16 19:29:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:29:07,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205291432] [2022-11-16 19:29:07,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205291432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461597200] [2022-11-16 19:29:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:07,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:07,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:29:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:29:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:29:07,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:29:07,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461597200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:07,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:29:07,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-16 19:29:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236861131] [2022-11-16 19:29:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:07,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:29:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:29:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:29:07,768 INFO L87 Difference]: Start difference. First operand 3999 states and 4725 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 19:29:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:29:09,051 INFO L93 Difference]: Finished difference Result 7242 states and 8653 transitions. [2022-11-16 19:29:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:29:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 103 [2022-11-16 19:29:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:29:09,066 INFO L225 Difference]: With dead ends: 7242 [2022-11-16 19:29:09,066 INFO L226 Difference]: Without dead ends: 4957 [2022-11-16 19:29:09,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:29:09,073 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 189 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:29:09,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 568 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:29:09,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-11-16 19:29:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4747. [2022-11-16 19:29:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 3659 states have (on average 1.1705383984695272) internal successors, (4283), 3685 states have internal predecessors, (4283), 592 states have call successors, (592), 495 states have call predecessors, (592), 494 states have return successors, (749), 568 states have call predecessors, (749), 591 states have call successors, (749) [2022-11-16 19:29:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 5624 transitions. [2022-11-16 19:29:09,720 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 5624 transitions. Word has length 103 [2022-11-16 19:29:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:29:09,720 INFO L495 AbstractCegarLoop]: Abstraction has 4747 states and 5624 transitions. [2022-11-16 19:29:09,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-16 19:29:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 5624 transitions. [2022-11-16 19:29:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 19:29:09,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:29:09,727 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:29:09,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 19:29:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 19:29:09,932 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:29:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:29:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1146756190, now seen corresponding path program 1 times [2022-11-16 19:29:09,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:29:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170375350] [2022-11-16 19:29:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:29:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 19:29:10,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:29:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170375350] [2022-11-16 19:29:10,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170375350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:29:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788696727] [2022-11-16 19:29:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:29:10,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:29:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:29:10,141 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:29:10,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:29:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:29:10,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:29:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:29:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:29:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:29:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 19:29:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788696727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:29:10,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [740251399] [2022-11-16 19:29:10,662 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-16 19:29:10,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:29:10,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:29:10,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:29:10,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:29:19,142 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 186 for LOIs [2022-11-16 19:29:21,465 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-11-16 19:29:21,490 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 192 for LOIs [2022-11-16 19:29:21,547 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-16 19:29:21,761 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 66 for LOIs [2022-11-16 19:29:22,338 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 216 for LOIs [2022-11-16 19:29:23,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:29:45,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [740251399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:29:45,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:29:45,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [8, 8, 6] total 60 [2022-11-16 19:29:45,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619508873] [2022-11-16 19:29:45,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:29:45,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 19:29:45,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:29:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 19:29:45,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 19:29:45,464 INFO L87 Difference]: Start difference. First operand 4747 states and 5624 transitions. Second operand has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:30:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:42,527 INFO L93 Difference]: Finished difference Result 8340 states and 9933 transitions. [2022-11-16 19:30:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-16 19:30:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 109 [2022-11-16 19:30:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:42,541 INFO L225 Difference]: With dead ends: 8340 [2022-11-16 19:30:42,541 INFO L226 Difference]: Without dead ends: 4695 [2022-11-16 19:30:42,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 263 SyntacticMatches, 17 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7965 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=1736, Invalid=19144, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 19:30:42,552 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 439 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1944 SdHoareTripleChecker+Invalid, 4903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:42,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1944 Invalid, 4903 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [177 Valid, 4726 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-16 19:30:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2022-11-16 19:30:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4648. [2022-11-16 19:30:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 3576 states have (on average 1.166387024608501) internal successors, (4171), 3603 states have internal predecessors, (4171), 581 states have call successors, (581), 490 states have call predecessors, (581), 489 states have return successors, (734), 556 states have call predecessors, (734), 580 states have call successors, (734) [2022-11-16 19:30:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 5486 transitions. [2022-11-16 19:30:43,366 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 5486 transitions. Word has length 109 [2022-11-16 19:30:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:43,367 INFO L495 AbstractCegarLoop]: Abstraction has 4648 states and 5486 transitions. [2022-11-16 19:30:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:30:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 5486 transitions. [2022-11-16 19:30:43,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:30:43,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:43,374 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:43,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 19:30:43,579 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1365738502, now seen corresponding path program 1 times [2022-11-16 19:30:43,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498148767] [2022-11-16 19:30:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:30:43,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:43,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498148767] [2022-11-16 19:30:43,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498148767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:43,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388333167] [2022-11-16 19:30:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:43,747 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:43,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:30:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:43,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:30:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:30:43,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:30:43,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388333167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:30:43,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:30:43,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-16 19:30:43,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097886191] [2022-11-16 19:30:43,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:30:43,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:30:43,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:30:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:30:43,955 INFO L87 Difference]: Start difference. First operand 4648 states and 5486 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 19:30:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:45,058 INFO L93 Difference]: Finished difference Result 5197 states and 6111 transitions. [2022-11-16 19:30:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:30:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-16 19:30:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:45,072 INFO L225 Difference]: With dead ends: 5197 [2022-11-16 19:30:45,073 INFO L226 Difference]: Without dead ends: 4604 [2022-11-16 19:30:45,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:30:45,076 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 67 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:45,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1106 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:30:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2022-11-16 19:30:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4512. [2022-11-16 19:30:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3476 states have (on average 1.166283084004603) internal successors, (4054), 3503 states have internal predecessors, (4054), 562 states have call successors, (562), 473 states have call predecessors, (562), 472 states have return successors, (715), 537 states have call predecessors, (715), 561 states have call successors, (715) [2022-11-16 19:30:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 5331 transitions. [2022-11-16 19:30:45,801 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 5331 transitions. Word has length 112 [2022-11-16 19:30:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:45,801 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 5331 transitions. [2022-11-16 19:30:45,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-16 19:30:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 5331 transitions. [2022-11-16 19:30:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 19:30:45,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:45,808 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:45,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:46,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:46,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1650442011, now seen corresponding path program 1 times [2022-11-16 19:30:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:46,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761841171] [2022-11-16 19:30:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:46,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-16 19:30:46,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:46,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761841171] [2022-11-16 19:30:46,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761841171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:46,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168826127] [2022-11-16 19:30:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:46,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:46,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:46,212 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:46,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:30:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:30:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:30:46,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:30:46,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168826127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:30:46,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:30:46,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-16 19:30:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909972824] [2022-11-16 19:30:46,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:30:46,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:30:46,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:30:46,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:30:46,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:30:46,413 INFO L87 Difference]: Start difference. First operand 4512 states and 5331 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 19:30:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:30:47,598 INFO L93 Difference]: Finished difference Result 5261 states and 6176 transitions. [2022-11-16 19:30:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:30:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-16 19:30:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:30:47,613 INFO L225 Difference]: With dead ends: 5261 [2022-11-16 19:30:47,613 INFO L226 Difference]: Without dead ends: 4804 [2022-11-16 19:30:47,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:30:47,617 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 148 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:30:47,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 830 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:30:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-16 19:30:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4770. [2022-11-16 19:30:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 3638 states have (on average 1.1638262781748214) internal successors, (4234), 3671 states have internal predecessors, (4234), 610 states have call successors, (610), 515 states have call predecessors, (610), 520 states have return successors, (775), 585 states have call predecessors, (775), 609 states have call successors, (775) [2022-11-16 19:30:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 5619 transitions. [2022-11-16 19:30:48,368 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 5619 transitions. Word has length 113 [2022-11-16 19:30:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:30:48,369 INFO L495 AbstractCegarLoop]: Abstraction has 4770 states and 5619 transitions. [2022-11-16 19:30:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-16 19:30:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 5619 transitions. [2022-11-16 19:30:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 19:30:48,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:30:48,375 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:30:48,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:30:48,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 19:30:48,582 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:30:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:30:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1528013402, now seen corresponding path program 1 times [2022-11-16 19:30:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:30:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928042861] [2022-11-16 19:30:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:48,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:30:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:30:48,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:30:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928042861] [2022-11-16 19:30:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928042861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:30:48,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671494613] [2022-11-16 19:30:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:30:48,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:30:48,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:30:48,777 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:30:48,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:30:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:30:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:30:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:30:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 54 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:30:49,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:30:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 19:30:49,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671494613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:30:49,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627455931] [2022-11-16 19:30:49,344 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-16 19:30:49,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:30:49,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:30:49,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:30:49,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:30:56,014 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-11-16 19:31:01,740 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 120 for LOIs [2022-11-16 19:31:01,783 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2022-11-16 19:31:01,847 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-16 19:31:01,966 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2022-11-16 19:31:02,556 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2022-11-16 19:31:09,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:31:24,942 WARN L233 SmtUtils]: Spent 13.63s on a formula simplification. DAG size of input: 409 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:31:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1627455931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:31:46,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:31:46,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [8, 8, 6] total 63 [2022-11-16 19:31:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145138088] [2022-11-16 19:31:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:31:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:31:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:31:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:31:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3506, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 19:31:46,078 INFO L87 Difference]: Start difference. First operand 4770 states and 5619 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:32:14,567 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 326 DAG size of output: 310 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:32:46,274 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification. DAG size of input: 325 DAG size of output: 307 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:33:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:11,987 INFO L93 Difference]: Finished difference Result 8325 states and 9920 transitions. [2022-11-16 19:33:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-16 19:33:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 111 [2022-11-16 19:33:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:12,002 INFO L225 Difference]: With dead ends: 8325 [2022-11-16 19:33:12,002 INFO L226 Difference]: Without dead ends: 5207 [2022-11-16 19:33:12,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 266 SyntacticMatches, 16 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10348 ImplicationChecksByTransitivity, 111.4s TimeCoverageRelationStatistics Valid=2166, Invalid=24894, Unknown=0, NotChecked=0, Total=27060 [2022-11-16 19:33:12,017 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 614 mSDsluCounter, 2392 mSDsCounter, 0 mSdLazyCounter, 5823 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 6024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 5823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:12,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 2559 Invalid, 6024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 5823 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2022-11-16 19:33:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2022-11-16 19:33:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5113. [2022-11-16 19:33:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 3892 states have (on average 1.157502569373073) internal successors, (4505), 3935 states have internal predecessors, (4505), 655 states have call successors, (655), 552 states have call predecessors, (655), 564 states have return successors, (834), 627 states have call predecessors, (834), 654 states have call successors, (834) [2022-11-16 19:33:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 5994 transitions. [2022-11-16 19:33:13,089 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 5994 transitions. Word has length 111 [2022-11-16 19:33:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:13,089 INFO L495 AbstractCegarLoop]: Abstraction has 5113 states and 5994 transitions. [2022-11-16 19:33:13,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:33:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 5994 transitions. [2022-11-16 19:33:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 19:33:13,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:13,095 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:13,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:13,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:13,300 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1071958657, now seen corresponding path program 1 times [2022-11-16 19:33:13,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:13,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800726570] [2022-11-16 19:33:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 19:33:14,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:14,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800726570] [2022-11-16 19:33:14,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800726570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:14,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783417849] [2022-11-16 19:33:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:14,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:14,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:14,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:33:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 19:33:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:33:15,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 19:33:17,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783417849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:17,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114195101] [2022-11-16 19:33:17,288 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-16 19:33:17,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:17,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:17,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:17,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:34,939 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 184 for LOIs [2022-11-16 19:33:35,226 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 136 for LOIs [2022-11-16 19:33:35,258 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 73 for LOIs [2022-11-16 19:33:35,264 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 196 for LOIs [2022-11-16 19:33:36,195 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 124 for LOIs [2022-11-16 19:33:36,355 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 73 for LOIs [2022-11-16 19:33:36,465 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 188 for LOIs [2022-11-16 19:33:36,756 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 211 for LOIs [2022-11-16 19:33:37,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:05,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258465#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~t2_i~0 0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (= ~local~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (= ~E_1~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:05,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:05,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:34:05,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 16] total 55 [2022-11-16 19:34:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12859322] [2022-11-16 19:34:05,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 19:34:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 19:34:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=11605, Unknown=0, NotChecked=0, Total=12432 [2022-11-16 19:34:05,314 INFO L87 Difference]: Start difference. First operand 5113 states and 5994 transitions. Second operand has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-16 19:34:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:33,518 INFO L93 Difference]: Finished difference Result 7731 states and 9043 transitions. [2022-11-16 19:34:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-11-16 19:34:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) Word has length 114 [2022-11-16 19:34:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:33,535 INFO L225 Difference]: With dead ends: 7731 [2022-11-16 19:34:33,536 INFO L226 Difference]: Without dead ends: 6932 [2022-11-16 19:34:33,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51500 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=11725, Invalid=117515, Unknown=0, NotChecked=0, Total=129240 [2022-11-16 19:34:33,555 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 4924 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 7505 mSolverCounterSat, 2721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4925 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 10226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2721 IncrementalHoareTripleChecker+Valid, 7505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:33,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4925 Valid, 2807 Invalid, 10226 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2721 Valid, 7505 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-16 19:34:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-11-16 19:34:35,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 5371. [2022-11-16 19:34:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5371 states, 4066 states have (on average 1.1571569109690114) internal successors, (4705), 4110 states have internal predecessors, (4705), 694 states have call successors, (694), 587 states have call predecessors, (694), 609 states have return successors, (885), 674 states have call predecessors, (885), 693 states have call successors, (885) [2022-11-16 19:34:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 6284 transitions. [2022-11-16 19:34:35,042 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 6284 transitions. Word has length 114 [2022-11-16 19:34:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:35,042 INFO L495 AbstractCegarLoop]: Abstraction has 5371 states and 6284 transitions. [2022-11-16 19:34:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 35 states have (on average 5.6) internal successors, (196), 39 states have internal predecessors, (196), 20 states have call successors, (44), 16 states have call predecessors, (44), 23 states have return successors, (46), 20 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-16 19:34:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 6284 transitions. [2022-11-16 19:34:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 19:34:35,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:35,045 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:35,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:35,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 19:34:35,246 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1282968393, now seen corresponding path program 1 times [2022-11-16 19:34:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:35,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506911188] [2022-11-16 19:34:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:34:35,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:35,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506911188] [2022-11-16 19:34:35,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506911188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:35,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229594830] [2022-11-16 19:34:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:35,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:35,725 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:35,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:34:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:34:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:34:36,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-16 19:34:36,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229594830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747881243] [2022-11-16 19:34:36,292 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-16 19:34:36,292 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:36,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:36,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:36,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:42,433 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-11-16 19:34:45,458 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 67 for LOIs [2022-11-16 19:34:45,473 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 193 for LOIs [2022-11-16 19:34:45,530 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 75 for LOIs [2022-11-16 19:34:45,626 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 67 for LOIs [2022-11-16 19:34:45,993 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 217 for LOIs [2022-11-16 19:34:47,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:35:11,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [747881243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:11,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:35:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [13, 9, 6] total 69 [2022-11-16 19:35:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681711766] [2022-11-16 19:35:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:35:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:35:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=4307, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 19:35:11,642 INFO L87 Difference]: Start difference. First operand 5371 states and 6284 transitions. Second operand has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:36:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:31,613 INFO L93 Difference]: Finished difference Result 9071 states and 10695 transitions. [2022-11-16 19:36:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-16 19:36:31,614 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 112 [2022-11-16 19:36:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:31,626 INFO L225 Difference]: With dead ends: 9071 [2022-11-16 19:36:31,626 INFO L226 Difference]: Without dead ends: 4979 [2022-11-16 19:36:31,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 273 SyntacticMatches, 17 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11614 ImplicationChecksByTransitivity, 95.4s TimeCoverageRelationStatistics Valid=2132, Invalid=26938, Unknown=0, NotChecked=0, Total=29070 [2022-11-16 19:36:31,637 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 568 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 5478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 5277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:31,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1995 Invalid, 5478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 5277 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-16 19:36:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2022-11-16 19:36:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 4926. [2022-11-16 19:36:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4926 states, 3722 states have (on average 1.1563675443310049) internal successors, (4304), 3762 states have internal predecessors, (4304), 640 states have call successors, (640), 540 states have call predecessors, (640), 562 states have return successors, (819), 624 states have call predecessors, (819), 639 states have call successors, (819) [2022-11-16 19:36:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4926 states to 4926 states and 5763 transitions. [2022-11-16 19:36:32,708 INFO L78 Accepts]: Start accepts. Automaton has 4926 states and 5763 transitions. Word has length 112 [2022-11-16 19:36:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:32,709 INFO L495 AbstractCegarLoop]: Abstraction has 4926 states and 5763 transitions. [2022-11-16 19:36:32,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-16 19:36:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4926 states and 5763 transitions. [2022-11-16 19:36:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 19:36:32,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:32,713 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:32,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 19:36:32,913 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 159345056, now seen corresponding path program 1 times [2022-11-16 19:36:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:36:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886863565] [2022-11-16 19:36:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:36:33,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:36:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886863565] [2022-11-16 19:36:33,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886863565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:36:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433586151] [2022-11-16 19:36:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:33,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:33,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:33,228 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 19:36:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:36:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:36:33,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 19:36:33,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433586151] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:36:33,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:36:33,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-16 19:36:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142945207] [2022-11-16 19:36:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:36:33,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:36:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:36:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:36:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:36:33,633 INFO L87 Difference]: Start difference. First operand 4926 states and 5763 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:36:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:35,276 INFO L93 Difference]: Finished difference Result 6254 states and 7316 transitions. [2022-11-16 19:36:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:36:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-16 19:36:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:35,286 INFO L225 Difference]: With dead ends: 6254 [2022-11-16 19:36:35,286 INFO L226 Difference]: Without dead ends: 5263 [2022-11-16 19:36:35,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:36:35,290 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 247 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:35,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 481 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:36:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2022-11-16 19:36:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5006. [2022-11-16 19:36:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 3767 states have (on average 1.156092381205203) internal successors, (4355), 3810 states have internal predecessors, (4355), 659 states have call successors, (659), 549 states have call predecessors, (659), 578 states have return successors, (859), 647 states have call predecessors, (859), 658 states have call successors, (859) [2022-11-16 19:36:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 5873 transitions. [2022-11-16 19:36:36,269 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 5873 transitions. Word has length 115 [2022-11-16 19:36:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:36,270 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 5873 transitions. [2022-11-16 19:36:36,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:36:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 5873 transitions. [2022-11-16 19:36:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-16 19:36:36,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:36,275 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:36,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:36,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 19:36:36,480 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1739317777, now seen corresponding path program 1 times [2022-11-16 19:36:36,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:36:36,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065406419] [2022-11-16 19:36:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:36,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:36:37,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:36:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065406419] [2022-11-16 19:36:37,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065406419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:36:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700037559] [2022-11-16 19:36:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:37,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:37,086 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:37,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:36:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 19:36:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:36:37,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 19:36:38,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700037559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:38,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980354150] [2022-11-16 19:36:38,626 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-16 19:36:38,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:36:38,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:36:38,628 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:36:38,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:36:53,960 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 120 for LOIs [2022-11-16 19:36:53,990 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 68 for LOIs [2022-11-16 19:36:54,001 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 139 for LOIs [2022-11-16 19:36:54,022 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 77 for LOIs [2022-11-16 19:36:54,140 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 125 for LOIs [2022-11-16 19:36:54,484 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 120 for LOIs [2022-11-16 19:36:54,518 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:37:17,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316332#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (<= ~local~0 2147483647) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (not (= ~token~0 (+ 2 ~local~0))) (= ~p_last_write~0 0) (<= 0 (+ ~local~0 2147483648)) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~a_t~0 0) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-16 19:37:17,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:37:17,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:37:17,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 14] total 39 [2022-11-16 19:37:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784598381] [2022-11-16 19:37:17,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 19:37:17,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:37:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 19:37:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=7579, Unknown=0, NotChecked=0, Total=8190 [2022-11-16 19:37:17,098 INFO L87 Difference]: Start difference. First operand 5006 states and 5873 transitions. Second operand has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-16 19:37:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:35,644 INFO L93 Difference]: Finished difference Result 11631 states and 13887 transitions. [2022-11-16 19:37:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-11-16 19:37:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) Word has length 114 [2022-11-16 19:37:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:35,659 INFO L225 Difference]: With dead ends: 11631 [2022-11-16 19:37:35,659 INFO L226 Difference]: Without dead ends: 8336 [2022-11-16 19:37:35,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 318 SyntacticMatches, 21 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32625 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=8353, Invalid=68099, Unknown=0, NotChecked=0, Total=76452 [2022-11-16 19:37:35,668 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 4190 mSDsluCounter, 2706 mSDsCounter, 0 mSdLazyCounter, 7939 mSolverCounterSat, 3015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 2908 SdHoareTripleChecker+Invalid, 10954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3015 IncrementalHoareTripleChecker+Valid, 7939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:35,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4190 Valid, 2908 Invalid, 10954 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3015 Valid, 7939 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 19:37:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2022-11-16 19:37:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 5256. [2022-11-16 19:37:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 3903 states have (on average 1.1462977197027928) internal successors, (4474), 3962 states have internal predecessors, (4474), 721 states have call successors, (721), 604 states have call predecessors, (721), 630 states have return successors, (841), 690 states have call predecessors, (841), 720 states have call successors, (841) [2022-11-16 19:37:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 6036 transitions. [2022-11-16 19:37:36,856 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 6036 transitions. Word has length 114 [2022-11-16 19:37:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:36,856 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 6036 transitions. [2022-11-16 19:37:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 7.2592592592592595) internal successors, (196), 30 states have internal predecessors, (196), 17 states have call successors, (44), 12 states have call predecessors, (44), 19 states have return successors, (44), 17 states have call predecessors, (44), 17 states have call successors, (44) [2022-11-16 19:37:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 6036 transitions. [2022-11-16 19:37:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 19:37:36,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:36,858 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:36,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 19:37:37,059 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:37:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash 758017092, now seen corresponding path program 1 times [2022-11-16 19:37:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:37:37,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461687359] [2022-11-16 19:37:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:37:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:37:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 19:37:37,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:37:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461687359] [2022-11-16 19:37:37,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461687359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:37:37,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894928568] [2022-11-16 19:37:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:37:37,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:37,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:37,718 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:37,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 19:37:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 19:37:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:37:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:37:40,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894928568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:40,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562515665] [2022-11-16 19:37:40,518 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-16 19:37:40,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:37:40,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:37:40,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:37:40,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:37:45,856 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 172 for LOIs [2022-11-16 19:37:46,170 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 121 for LOIs [2022-11-16 19:37:46,191 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 60 for LOIs [2022-11-16 19:37:46,196 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 184 for LOIs [2022-11-16 19:37:47,013 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 112 for LOIs [2022-11-16 19:37:47,120 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 60 for LOIs [2022-11-16 19:37:47,205 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 176 for LOIs [2022-11-16 19:37:47,452 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 199 for LOIs [2022-11-16 19:37:47,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:38:13,510 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '341631#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (<= 0 ~p_dw_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (= ~local~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (= ~E_1~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-16 19:38:13,510 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:38:13,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:38:13,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2022-11-16 19:38:13,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392081524] [2022-11-16 19:38:13,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:38:13,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 19:38:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 19:38:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=939, Invalid=10833, Unknown=0, NotChecked=0, Total=11772 [2022-11-16 19:38:13,514 INFO L87 Difference]: Start difference. First operand 5256 states and 6036 transitions. Second operand has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2022-11-16 19:38:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:26,580 INFO L93 Difference]: Finished difference Result 7474 states and 8629 transitions. [2022-11-16 19:38:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-16 19:38:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) Word has length 124 [2022-11-16 19:38:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:26,592 INFO L225 Difference]: With dead ends: 7474 [2022-11-16 19:38:26,593 INFO L226 Difference]: Without dead ends: 6403 [2022-11-16 19:38:26,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17455 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=4401, Invalid=40331, Unknown=0, NotChecked=0, Total=44732 [2022-11-16 19:38:26,599 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 5270 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 6827 mSolverCounterSat, 3678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5270 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 10505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3678 IncrementalHoareTripleChecker+Valid, 6827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:26,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5270 Valid, 2208 Invalid, 10505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3678 Valid, 6827 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-16 19:38:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2022-11-16 19:38:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 5072. [2022-11-16 19:38:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5072 states, 3791 states have (on average 1.1463993669216566) internal successors, (4346), 3849 states have internal predecessors, (4346), 681 states have call successors, (681), 572 states have call predecessors, (681), 598 states have return successors, (791), 651 states have call predecessors, (791), 680 states have call successors, (791) [2022-11-16 19:38:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5072 states to 5072 states and 5818 transitions. [2022-11-16 19:38:27,908 INFO L78 Accepts]: Start accepts. Automaton has 5072 states and 5818 transitions. Word has length 124 [2022-11-16 19:38:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:27,909 INFO L495 AbstractCegarLoop]: Abstraction has 5072 states and 5818 transitions. [2022-11-16 19:38:27,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 34 states have (on average 6.264705882352941) internal successors, (213), 39 states have internal predecessors, (213), 24 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 23 states have call predecessors, (51), 24 states have call successors, (51) [2022-11-16 19:38:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5072 states and 5818 transitions. [2022-11-16 19:38:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 19:38:27,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:27,912 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:27,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:28,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:28,112 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash -295057219, now seen corresponding path program 1 times [2022-11-16 19:38:28,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:28,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099699631] [2022-11-16 19:38:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 19:38:28,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099699631] [2022-11-16 19:38:28,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099699631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683824552] [2022-11-16 19:38:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:28,288 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:28,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 19:38:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:38:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-16 19:38:28,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 19:38:28,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683824552] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:28,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:38:28,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-16 19:38:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310717577] [2022-11-16 19:38:28,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:38:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:38:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:38:28,762 INFO L87 Difference]: Start difference. First operand 5072 states and 5818 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:38:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:30,559 INFO L93 Difference]: Finished difference Result 5733 states and 6565 transitions. [2022-11-16 19:38:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:38:30,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-16 19:38:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:30,566 INFO L225 Difference]: With dead ends: 5733 [2022-11-16 19:38:30,566 INFO L226 Difference]: Without dead ends: 4846 [2022-11-16 19:38:30,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:38:30,569 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 448 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:38:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2022-11-16 19:38:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4803. [2022-11-16 19:38:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 3592 states have (on average 1.1417037861915367) internal successors, (4101), 3650 states have internal predecessors, (4101), 645 states have call successors, (645), 542 states have call predecessors, (645), 564 states have return successors, (750), 611 states have call predecessors, (750), 644 states have call successors, (750) [2022-11-16 19:38:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 5496 transitions. [2022-11-16 19:38:31,847 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 5496 transitions. Word has length 125 [2022-11-16 19:38:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:31,847 INFO L495 AbstractCegarLoop]: Abstraction has 4803 states and 5496 transitions. [2022-11-16 19:38:31,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 19:38:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 5496 transitions. [2022-11-16 19:38:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 19:38:31,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:31,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:31,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 19:38:32,062 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash -754676394, now seen corresponding path program 1 times [2022-11-16 19:38:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:32,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613064978] [2022-11-16 19:38:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:32,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 19:38:32,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:32,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613064978] [2022-11-16 19:38:32,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613064978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:32,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:38:32,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:38:32,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79851117] [2022-11-16 19:38:32,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:32,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:38:32,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:32,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:38:32,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:38:32,191 INFO L87 Difference]: Start difference. First operand 4803 states and 5496 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 19:38:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:34,694 INFO L93 Difference]: Finished difference Result 11311 states and 13034 transitions. [2022-11-16 19:38:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:38:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 127 [2022-11-16 19:38:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:34,715 INFO L225 Difference]: With dead ends: 11311 [2022-11-16 19:38:34,715 INFO L226 Difference]: Without dead ends: 8571 [2022-11-16 19:38:34,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:38:34,720 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 311 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:34,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 709 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:38:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8571 states. [2022-11-16 19:38:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8571 to 7272. [2022-11-16 19:38:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7272 states, 5456 states have (on average 1.1548753665689149) internal successors, (6301), 5535 states have internal predecessors, (6301), 970 states have call successors, (970), 819 states have call predecessors, (970), 844 states have return successors, (1114), 918 states have call predecessors, (1114), 969 states have call successors, (1114) [2022-11-16 19:38:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7272 states to 7272 states and 8385 transitions. [2022-11-16 19:38:36,561 INFO L78 Accepts]: Start accepts. Automaton has 7272 states and 8385 transitions. Word has length 127 [2022-11-16 19:38:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:36,561 INFO L495 AbstractCegarLoop]: Abstraction has 7272 states and 8385 transitions. [2022-11-16 19:38:36,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 19:38:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7272 states and 8385 transitions. [2022-11-16 19:38:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-16 19:38:36,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:36,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-16 19:38:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-16 19:38:36,568 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1470280667, now seen corresponding path program 1 times [2022-11-16 19:38:36,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:36,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667493167] [2022-11-16 19:38:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 19:38:36,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667493167] [2022-11-16 19:38:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667493167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346417241] [2022-11-16 19:38:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:36,698 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:36,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:38:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:38:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 19:38:36,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:38:36,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346417241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:36,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:38:36,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-16 19:38:36,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836470816] [2022-11-16 19:38:36,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:36,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:38:36,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:38:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:38:36,914 INFO L87 Difference]: Start difference. First operand 7272 states and 8385 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 19:38:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:38,995 INFO L93 Difference]: Finished difference Result 14469 states and 16551 transitions. [2022-11-16 19:38:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:38:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 158 [2022-11-16 19:38:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:39,007 INFO L225 Difference]: With dead ends: 14469 [2022-11-16 19:38:39,007 INFO L226 Difference]: Without dead ends: 7964 [2022-11-16 19:38:39,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:38:39,014 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 156 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:39,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 526 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:38:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7964 states. [2022-11-16 19:38:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7964 to 7934. [2022-11-16 19:38:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 5908 states have (on average 1.1113744075829384) internal successors, (6566), 5993 states have internal predecessors, (6566), 1100 states have call successors, (1100), 901 states have call predecessors, (1100), 924 states have return successors, (1228), 1040 states have call predecessors, (1228), 1099 states have call successors, (1228) [2022-11-16 19:38:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 8894 transitions. [2022-11-16 19:38:41,142 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 8894 transitions. Word has length 158 [2022-11-16 19:38:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:41,143 INFO L495 AbstractCegarLoop]: Abstraction has 7934 states and 8894 transitions. [2022-11-16 19:38:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 19:38:41,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 8894 transitions. [2022-11-16 19:38:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-16 19:38:41,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:41,148 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:41,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 19:38:41,349 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2032070462, now seen corresponding path program 1 times [2022-11-16 19:38:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:41,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797297277] [2022-11-16 19:38:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-16 19:38:41,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797297277] [2022-11-16 19:38:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797297277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391213878] [2022-11-16 19:38:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:41,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:41,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:41,496 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:41,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 19:38:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:41,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:38:41,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-16 19:38:41,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:38:41,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391213878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:41,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:38:41,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-16 19:38:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663222927] [2022-11-16 19:38:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:38:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:38:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:38:41,690 INFO L87 Difference]: Start difference. First operand 7934 states and 8894 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 19:38:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:43,322 INFO L93 Difference]: Finished difference Result 11868 states and 13296 transitions. [2022-11-16 19:38:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:38:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-11-16 19:38:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:43,333 INFO L225 Difference]: With dead ends: 11868 [2022-11-16 19:38:43,333 INFO L226 Difference]: Without dead ends: 6108 [2022-11-16 19:38:43,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:38:43,340 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 167 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:43,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 509 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:38:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-11-16 19:38:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 6029. [2022-11-16 19:38:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 4484 states have (on average 1.1048171275646743) internal successors, (4954), 4553 states have internal predecessors, (4954), 832 states have call successors, (832), 684 states have call predecessors, (832), 711 states have return successors, (928), 792 states have call predecessors, (928), 831 states have call successors, (928) [2022-11-16 19:38:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 6714 transitions. [2022-11-16 19:38:45,116 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 6714 transitions. Word has length 159 [2022-11-16 19:38:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:45,116 INFO L495 AbstractCegarLoop]: Abstraction has 6029 states and 6714 transitions. [2022-11-16 19:38:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 19:38:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 6714 transitions. [2022-11-16 19:38:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 19:38:45,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:45,120 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:45,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:45,320 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash 264810841, now seen corresponding path program 1 times [2022-11-16 19:38:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667484902] [2022-11-16 19:38:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 89 proven. 15 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 19:38:45,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:45,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667484902] [2022-11-16 19:38:45,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667484902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:45,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500527622] [2022-11-16 19:38:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:45,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:45,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:45,612 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:45,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 19:38:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:38:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 19:38:45,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:38:45,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500527622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:45,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:38:45,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-16 19:38:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077216652] [2022-11-16 19:38:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:38:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:38:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:38:45,824 INFO L87 Difference]: Start difference. First operand 6029 states and 6714 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-16 19:38:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:46,897 INFO L93 Difference]: Finished difference Result 6519 states and 7254 transitions. [2022-11-16 19:38:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:38:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 160 [2022-11-16 19:38:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:46,900 INFO L225 Difference]: With dead ends: 6519 [2022-11-16 19:38:46,900 INFO L226 Difference]: Without dead ends: 693 [2022-11-16 19:38:46,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:38:46,907 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 177 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:46,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 428 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:38:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-16 19:38:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2022-11-16 19:38:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 484 states have internal predecessors, (523), 108 states have call successors, (108), 92 states have call predecessors, (108), 110 states have return successors, (137), 116 states have call predecessors, (137), 107 states have call successors, (137) [2022-11-16 19:38:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 768 transitions. [2022-11-16 19:38:47,090 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 768 transitions. Word has length 160 [2022-11-16 19:38:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:47,090 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 768 transitions. [2022-11-16 19:38:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-16 19:38:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 768 transitions. [2022-11-16 19:38:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-16 19:38:47,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:47,092 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:47,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:47,292 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:38:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1134278309, now seen corresponding path program 1 times [2022-11-16 19:38:47,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:38:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894773468] [2022-11-16 19:38:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:47,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:38:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 115 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-16 19:38:47,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:38:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894773468] [2022-11-16 19:38:47,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894773468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:38:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763431682] [2022-11-16 19:38:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:38:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:47,835 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:38:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:38:48,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:38:48,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 19:38:48,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:38:48,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763431682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:38:48,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:38:48,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [19] total 26 [2022-11-16 19:38:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299458624] [2022-11-16 19:38:48,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:38:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:38:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:38:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:38:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:38:48,165 INFO L87 Difference]: Start difference. First operand 693 states and 768 transitions. Second operand has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-16 19:38:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:48,468 INFO L93 Difference]: Finished difference Result 946 states and 1046 transitions. [2022-11-16 19:38:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:38:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) Word has length 220 [2022-11-16 19:38:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:48,469 INFO L225 Difference]: With dead ends: 946 [2022-11-16 19:38:48,469 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 19:38:48,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:38:48,470 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 44 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:48,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 748 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:38:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 19:38:48,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 19:38:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:38:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 19:38:48,472 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 220 [2022-11-16 19:38:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:48,472 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 19:38:48,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (22), 3 states have call predecessors, (22), 5 states have return successors, (22), 5 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-16 19:38:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 19:38:48,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 19:38:48,475 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-16 19:38:48,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-16 19:38:48,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:48,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51ce875f-c794-490c-b263-2a3e5871ff07/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 19:38:48,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-16 19:40:36,366 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 444 DAG size of output: 149 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 19:40:57,783 WARN L233 SmtUtils]: Spent 11.92s on a formula simplification. DAG size of input: 792 DAG size of output: 296 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 19:41:15,817 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 475 DAG size of output: 248 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-16 19:41:39,516 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 444 DAG size of output: 149 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)