./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/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_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/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_d3666054-744b-436a-8c03-3c08c6f0777f/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 b08ac6f553c71235d6c242059db3dcace1924bc9c3a272f401632c3f1b127664 --- 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 19:42:16,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:42:16,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:42:16,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:42:16,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:42:16,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:42:16,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:42:16,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:42:16,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:42:16,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:42:16,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:42:16,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:42:16,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:42:16,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:42:16,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:42:16,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:42:16,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:42:16,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:42:16,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:42:16,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:42:16,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:42:16,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:42:16,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:42:16,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:42:16,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:42:16,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:42:16,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:42:16,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:42:16,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:42:16,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:42:16,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:42:16,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:42:16,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:42:16,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:42:16,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:42:16,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:42:16,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:42:16,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:42:16,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:42:16,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:42:16,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:42:16,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:42:16,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:42:16,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:42:16,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:42:16,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:42:16,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:42:16,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:42:16,272 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:42:16,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:42:16,272 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:42:16,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:42:16,274 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:42:16,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:42:16,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:42:16,275 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:42:16,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:42:16,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:42:16,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:42:16,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:42:16,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:42:16,278 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:42:16,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:42:16,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:42:16,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:42:16,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:42:16,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:42:16,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:42:16,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:42:16,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:42:16,282 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:42:16,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:42:16,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:42:16,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:42:16,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:42:16,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:42:16,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:42:16,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:42:16,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:42:16,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:42:16,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:42:16,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:42:16,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:42:16,288 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_d3666054-744b-436a-8c03-3c08c6f0777f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b08ac6f553c71235d6c242059db3dcace1924bc9c3a272f401632c3f1b127664 [2022-11-16 19:42:16,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:42:16,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:42:16,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:42:16,641 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:42:16,642 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:42:16,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c [2022-11-16 19:42:16,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/data/1e82758a4/68cbc51476a948d093c65fd039df93aa/FLAG24284ecc9 [2022-11-16 19:42:17,289 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:42:17,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c [2022-11-16 19:42:17,305 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/data/1e82758a4/68cbc51476a948d093c65fd039df93aa/FLAG24284ecc9 [2022-11-16 19:42:17,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/data/1e82758a4/68cbc51476a948d093c65fd039df93aa [2022-11-16 19:42:17,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:42:17,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:42:17,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:17,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:42:17,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:42:17,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:17" (1/1) ... [2022-11-16 19:42:17,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434fa87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:17, skipping insertion in model container [2022-11-16 19:42:17,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:42:17" (1/1) ... [2022-11-16 19:42:17,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:42:17,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:42:17,904 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_d3666054-744b-436a-8c03-3c08c6f0777f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c[911,924] [2022-11-16 19:42:17,986 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_d3666054-744b-436a-8c03-3c08c6f0777f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c[8416,8429] [2022-11-16 19:42:18,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:18,087 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:42:18,101 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_d3666054-744b-436a-8c03-3c08c6f0777f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c[911,924] [2022-11-16 19:42:18,127 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_d3666054-744b-436a-8c03-3c08c6f0777f/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-1.c[8416,8429] [2022-11-16 19:42:18,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:42:18,211 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:42:18,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18 WrapperNode [2022-11-16 19:42:18,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:42:18,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:18,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:42:18,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:42:18,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,286 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 788 [2022-11-16 19:42:18,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:42:18,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:42:18,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:42:18,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:42:18,298 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:42:18,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:42:18,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:42:18,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:42:18,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (1/1) ... [2022-11-16 19:42:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:42:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:18,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:42:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:42:18,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:42:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 19:42:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 19:42:18,493 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-16 19:42:18,493 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-16 19:42:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 19:42:18,494 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 19:42:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 19:42:18,494 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 19:42:18,494 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-16 19:42:18,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-16 19:42:18,495 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 19:42:18,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 19:42:18,495 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 19:42:18,495 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 19:42:18,496 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-16 19:42:18,496 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-16 19:42:18,496 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-16 19:42:18,496 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-16 19:42:18,496 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-16 19:42:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-16 19:42:18,497 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 19:42:18,497 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 19:42:18,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:42:18,497 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 19:42:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 19:42:18,498 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-16 19:42:18,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-16 19:42:18,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:42:18,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:42:18,499 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 19:42:18,499 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 19:42:18,654 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:42:18,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:42:19,490 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-16 19:42:19,490 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-16 19:42:19,595 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:42:20,156 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:42:20,156 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-16 19:42:20,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:20 BoogieIcfgContainer [2022-11-16 19:42:20,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:42:20,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:42:20,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:42:20,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:42:20,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:42:17" (1/3) ... [2022-11-16 19:42:20,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c47ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:20, skipping insertion in model container [2022-11-16 19:42:20,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:42:18" (2/3) ... [2022-11-16 19:42:20,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c47ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:42:20, skipping insertion in model container [2022-11-16 19:42:20,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:42:20" (3/3) ... [2022-11-16 19:42:20,174 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.07.cil-1.c [2022-11-16 19:42:20,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:42:20,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 19:42:20,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:42:20,319 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;@3c637395, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:42:20,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 19:42:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 158 states have (on average 1.5253164556962024) internal successors, (241), 164 states have internal predecessors, (241), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-16 19:42:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 19:42:20,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:20,343 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] [2022-11-16 19:42:20,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1499003963, now seen corresponding path program 1 times [2022-11-16 19:42:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:20,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737650712] [2022-11-16 19:42:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:20,886 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 19:42:20,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:20,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737650712] [2022-11-16 19:42:20,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737650712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:20,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:20,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:42:20,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121068065] [2022-11-16 19:42:20,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:20,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:42:20,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:20,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:42:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:42:20,949 INFO L87 Difference]: Start difference. First operand has 212 states, 158 states have (on average 1.5253164556962024) internal successors, (241), 164 states have internal predecessors, (241), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 19:42:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:21,638 INFO L93 Difference]: Finished difference Result 547 states and 808 transitions. [2022-11-16 19:42:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:42:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 44 [2022-11-16 19:42:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:21,658 INFO L225 Difference]: With dead ends: 547 [2022-11-16 19:42:21,658 INFO L226 Difference]: Without dead ends: 336 [2022-11-16 19:42:21,664 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 19:42:21,668 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 367 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:21,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 566 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:42:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-16 19:42:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 325. [2022-11-16 19:42:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 239 states have (on average 1.4267782426778242) internal successors, (341), 243 states have internal predecessors, (341), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2022-11-16 19:42:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 456 transitions. [2022-11-16 19:42:21,798 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 456 transitions. Word has length 44 [2022-11-16 19:42:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:21,799 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 456 transitions. [2022-11-16 19:42:21,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 19:42:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 456 transitions. [2022-11-16 19:42:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 19:42:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:21,804 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 19:42:21,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:42:21,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1577403182, now seen corresponding path program 1 times [2022-11-16 19:42:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205237265] [2022-11-16 19:42:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:22,075 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 19:42:22,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205237265] [2022-11-16 19:42:22,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205237265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:22,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:22,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:42:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231867009] [2022-11-16 19:42:22,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:42:22,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:42:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:22,087 INFO L87 Difference]: Start difference. First operand 325 states and 456 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 19:42:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:23,129 INFO L93 Difference]: Finished difference Result 862 states and 1179 transitions. [2022-11-16 19:42:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:42:23,131 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 19:42:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:23,143 INFO L225 Difference]: With dead ends: 862 [2022-11-16 19:42:23,143 INFO L226 Difference]: Without dead ends: 396 [2022-11-16 19:42:23,151 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 19:42:23,153 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 814 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:23,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 996 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:42:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-16 19:42:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 311. [2022-11-16 19:42:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 225 states have (on average 1.3688888888888888) internal successors, (308), 229 states have internal predecessors, (308), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-16 19:42:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 420 transitions. [2022-11-16 19:42:23,238 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 420 transitions. Word has length 45 [2022-11-16 19:42:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:23,239 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 420 transitions. [2022-11-16 19:42:23,239 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 19:42:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 420 transitions. [2022-11-16 19:42:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 19:42:23,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:23,249 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 19:42:23,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:42:23,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -257642766, now seen corresponding path program 1 times [2022-11-16 19:42:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238238604] [2022-11-16 19:42:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:23,457 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 19:42:23,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:23,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238238604] [2022-11-16 19:42:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238238604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:23,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:23,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:42:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786702354] [2022-11-16 19:42:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:42:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:42:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:23,464 INFO L87 Difference]: Start difference. First operand 311 states and 420 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 19:42:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:24,348 INFO L93 Difference]: Finished difference Result 777 states and 1028 transitions. [2022-11-16 19:42:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:42:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 46 [2022-11-16 19:42:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:24,354 INFO L225 Difference]: With dead ends: 777 [2022-11-16 19:42:24,355 INFO L226 Difference]: Without dead ends: 600 [2022-11-16 19:42:24,358 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 19:42:24,365 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 728 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:24,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 940 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:42:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-16 19:42:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 575. [2022-11-16 19:42:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 406 states have (on average 1.2980295566502462) internal successors, (527), 410 states have internal predecessors, (527), 106 states have call successors, (106), 62 states have call predecessors, (106), 61 states have return successors, (121), 104 states have call predecessors, (121), 104 states have call successors, (121) [2022-11-16 19:42:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 754 transitions. [2022-11-16 19:42:24,458 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 754 transitions. Word has length 46 [2022-11-16 19:42:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:24,458 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 754 transitions. [2022-11-16 19:42:24,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 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 19:42:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 754 transitions. [2022-11-16 19:42:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 19:42:24,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:24,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:24,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:42:24,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1002933939, now seen corresponding path program 1 times [2022-11-16 19:42:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264579059] [2022-11-16 19:42:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:24,545 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 19:42:24,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264579059] [2022-11-16 19:42:24,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264579059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:24,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:24,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:24,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037104590] [2022-11-16 19:42:24,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:24,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:24,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:24,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:24,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:24,551 INFO L87 Difference]: Start difference. First operand 575 states and 754 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:42:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:24,677 INFO L93 Difference]: Finished difference Result 576 states and 755 transitions. [2022-11-16 19:42:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 50 [2022-11-16 19:42:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:24,681 INFO L225 Difference]: With dead ends: 576 [2022-11-16 19:42:24,681 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 19:42:24,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:24,689 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:24,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 233 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 19:42:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-16 19:42:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 104 states have (on average 1.4903846153846154) internal successors, (155), 105 states have internal predecessors, (155), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 19:42:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 197 transitions. [2022-11-16 19:42:24,715 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 197 transitions. Word has length 50 [2022-11-16 19:42:24,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:24,717 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 197 transitions. [2022-11-16 19:42:24,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:42:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 197 transitions. [2022-11-16 19:42:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 19:42:24,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:24,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:24,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:42:24,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1475780920, now seen corresponding path program 1 times [2022-11-16 19:42:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:24,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189508912] [2022-11-16 19:42:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:24,946 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 19:42:24,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:24,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189508912] [2022-11-16 19:42:24,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189508912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:24,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:24,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:42:24,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675390664] [2022-11-16 19:42:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:24,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:42:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:42:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:42:24,949 INFO L87 Difference]: Start difference. First operand 132 states and 197 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 19:42:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:25,745 INFO L93 Difference]: Finished difference Result 735 states and 1171 transitions. [2022-11-16 19:42:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:42:25,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 52 [2022-11-16 19:42:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:25,752 INFO L225 Difference]: With dead ends: 735 [2022-11-16 19:42:25,752 INFO L226 Difference]: Without dead ends: 609 [2022-11-16 19:42:25,753 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 19:42:25,756 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 859 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:25,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 871 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:42:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-11-16 19:42:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 598. [2022-11-16 19:42:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 481 states have (on average 1.4906444906444907) internal successors, (717), 485 states have internal predecessors, (717), 86 states have call successors, (86), 30 states have call predecessors, (86), 30 states have return successors, (128), 83 states have call predecessors, (128), 86 states have call successors, (128) [2022-11-16 19:42:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 931 transitions. [2022-11-16 19:42:25,836 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 931 transitions. Word has length 52 [2022-11-16 19:42:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:25,837 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 931 transitions. [2022-11-16 19:42:25,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 19:42:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 931 transitions. [2022-11-16 19:42:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 19:42:25,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:25,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:42:25,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1153348399, now seen corresponding path program 1 times [2022-11-16 19:42:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:25,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508405276] [2022-11-16 19:42:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:42:26,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508405276] [2022-11-16 19:42:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508405276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227560258] [2022-11-16 19:42:26,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:26,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:26,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:42:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 19:42:26,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:26,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227560258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:26,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:42:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873518319] [2022-11-16 19:42:26,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:26,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:26,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:26,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:26,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:26,445 INFO L87 Difference]: Start difference. First operand 598 states and 931 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:26,685 INFO L93 Difference]: Finished difference Result 1766 states and 2830 transitions. [2022-11-16 19:42:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 19:42:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:26,695 INFO L225 Difference]: With dead ends: 1766 [2022-11-16 19:42:26,695 INFO L226 Difference]: Without dead ends: 1174 [2022-11-16 19:42:26,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 19:42:26,700 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 169 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:26,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 327 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-11-16 19:42:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1167. [2022-11-16 19:42:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 943 states have (on average 1.4846235418875928) internal successors, (1400), 950 states have internal predecessors, (1400), 163 states have call successors, (163), 60 states have call predecessors, (163), 60 states have return successors, (243), 157 states have call predecessors, (243), 163 states have call successors, (243) [2022-11-16 19:42:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1806 transitions. [2022-11-16 19:42:26,871 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1806 transitions. Word has length 101 [2022-11-16 19:42:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:26,872 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1806 transitions. [2022-11-16 19:42:26,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1806 transitions. [2022-11-16 19:42:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 19:42:26,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:26,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:26,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:42:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:42:27,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -650282861, now seen corresponding path program 1 times [2022-11-16 19:42:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:27,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948267240] [2022-11-16 19:42:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:42:27,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948267240] [2022-11-16 19:42:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948267240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159395013] [2022-11-16 19:42:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:27,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:42:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:27,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 19:42:27,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159395013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:27,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:27,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:42:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831947050] [2022-11-16 19:42:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:27,614 INFO L87 Difference]: Start difference. First operand 1167 states and 1806 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:28,004 INFO L93 Difference]: Finished difference Result 3458 states and 5502 transitions. [2022-11-16 19:42:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 19:42:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:28,021 INFO L225 Difference]: With dead ends: 3458 [2022-11-16 19:42:28,021 INFO L226 Difference]: Without dead ends: 2297 [2022-11-16 19:42:28,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 19:42:28,032 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 160 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:28,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 327 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-11-16 19:42:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2285. [2022-11-16 19:42:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 1852 states have (on average 1.4773218142548596) internal successors, (2736), 1865 states have internal predecessors, (2736), 312 states have call successors, (312), 120 states have call predecessors, (312), 120 states have return successors, (464), 300 states have call predecessors, (464), 312 states have call successors, (464) [2022-11-16 19:42:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3512 transitions. [2022-11-16 19:42:28,356 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3512 transitions. Word has length 101 [2022-11-16 19:42:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:28,356 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 3512 transitions. [2022-11-16 19:42:28,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3512 transitions. [2022-11-16 19:42:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 19:42:28,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:28,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:28,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:28,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:42:28,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1192842607, now seen corresponding path program 1 times [2022-11-16 19:42:28,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:28,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803489074] [2022-11-16 19:42:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:28,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 19:42:28,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803489074] [2022-11-16 19:42:28,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803489074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372754122] [2022-11-16 19:42:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:28,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:28,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:28,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:42:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:28,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 19:42:29,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:29,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372754122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:29,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:29,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 19:42:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903541063] [2022-11-16 19:42:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:29,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:29,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:29,030 INFO L87 Difference]: Start difference. First operand 2285 states and 3512 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:29,559 INFO L93 Difference]: Finished difference Result 6782 states and 10705 transitions. [2022-11-16 19:42:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-16 19:42:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:29,591 INFO L225 Difference]: With dead ends: 6782 [2022-11-16 19:42:29,592 INFO L226 Difference]: Without dead ends: 4503 [2022-11-16 19:42:29,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 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 19:42:29,605 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 166 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:29,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 327 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2022-11-16 19:42:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 4481. [2022-11-16 19:42:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 3640 states have (on average 1.4692307692307693) internal successors, (5348), 3665 states have internal predecessors, (5348), 600 states have call successors, (600), 240 states have call predecessors, (600), 240 states have return successors, (888), 576 states have call predecessors, (888), 600 states have call successors, (888) [2022-11-16 19:42:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 6836 transitions. [2022-11-16 19:42:30,052 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 6836 transitions. Word has length 101 [2022-11-16 19:42:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:30,053 INFO L495 AbstractCegarLoop]: Abstraction has 4481 states and 6836 transitions. [2022-11-16 19:42:30,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 19:42:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 6836 transitions. [2022-11-16 19:42:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-16 19:42:30,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:30,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:30,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 19:42:30,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:30,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash 60155407, now seen corresponding path program 1 times [2022-11-16 19:42:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:30,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613363146] [2022-11-16 19:42:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:30,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 19:42:30,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:30,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613363146] [2022-11-16 19:42:30,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613363146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:30,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:30,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:30,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656574717] [2022-11-16 19:42:30,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:30,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:30,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:30,438 INFO L87 Difference]: Start difference. First operand 4481 states and 6836 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 19:42:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:31,077 INFO L93 Difference]: Finished difference Result 9091 states and 14201 transitions. [2022-11-16 19:42:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:31,078 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), 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 101 [2022-11-16 19:42:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:31,119 INFO L225 Difference]: With dead ends: 9091 [2022-11-16 19:42:31,119 INFO L226 Difference]: Without dead ends: 5505 [2022-11-16 19:42:31,138 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 19:42:31,141 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 83 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:31,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 415 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:31,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5505 states. [2022-11-16 19:42:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5505 to 5121. [2022-11-16 19:42:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5121 states, 4248 states have (on average 1.5056497175141244) internal successors, (6396), 4273 states have internal predecessors, (6396), 616 states have call successors, (616), 256 states have call predecessors, (616), 256 states have return successors, (904), 592 states have call predecessors, (904), 616 states have call successors, (904) [2022-11-16 19:42:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5121 states to 5121 states and 7916 transitions. [2022-11-16 19:42:31,802 INFO L78 Accepts]: Start accepts. Automaton has 5121 states and 7916 transitions. Word has length 101 [2022-11-16 19:42:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:31,802 INFO L495 AbstractCegarLoop]: Abstraction has 5121 states and 7916 transitions. [2022-11-16 19:42:31,803 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), 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 19:42:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5121 states and 7916 transitions. [2022-11-16 19:42:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 19:42:31,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:31,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:42:31,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1812071661, now seen corresponding path program 1 times [2022-11-16 19:42:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883322534] [2022-11-16 19:42:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 19:42:31,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:31,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883322534] [2022-11-16 19:42:31,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883322534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:31,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:31,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:31,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390315517] [2022-11-16 19:42:31,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:31,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:31,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:31,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:31,967 INFO L87 Difference]: Start difference. First operand 5121 states and 7916 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:33,088 INFO L93 Difference]: Finished difference Result 15174 states and 23957 transitions. [2022-11-16 19:42:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 136 [2022-11-16 19:42:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:33,192 INFO L225 Difference]: With dead ends: 15174 [2022-11-16 19:42:33,193 INFO L226 Difference]: Without dead ends: 10059 [2022-11-16 19:42:33,218 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 19:42:33,219 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 160 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 329 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2022-11-16 19:42:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 10001. [2022-11-16 19:42:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 8300 states have (on average 1.4944578313253012) internal successors, (12404), 8349 states have internal predecessors, (12404), 1188 states have call successors, (1188), 512 states have call predecessors, (1188), 512 states have return successors, (1732), 1140 states have call predecessors, (1732), 1188 states have call successors, (1732) [2022-11-16 19:42:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 15324 transitions. [2022-11-16 19:42:34,352 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 15324 transitions. Word has length 136 [2022-11-16 19:42:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 10001 states and 15324 transitions. [2022-11-16 19:42:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 15324 transitions. [2022-11-16 19:42:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 19:42:34,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:34,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:34,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:42:34,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1172050727, now seen corresponding path program 1 times [2022-11-16 19:42:34,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964220447] [2022-11-16 19:42:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:34,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 19:42:34,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:34,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964220447] [2022-11-16 19:42:34,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964220447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:34,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:34,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:34,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659476364] [2022-11-16 19:42:34,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:34,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:34,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:34,532 INFO L87 Difference]: Start difference. First operand 10001 states and 15324 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:36,665 INFO L93 Difference]: Finished difference Result 29638 states and 46337 transitions. [2022-11-16 19:42:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 136 [2022-11-16 19:42:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:36,799 INFO L225 Difference]: With dead ends: 29638 [2022-11-16 19:42:36,799 INFO L226 Difference]: Without dead ends: 19643 [2022-11-16 19:42:36,861 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 19:42:36,862 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 162 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:36,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 329 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2022-11-16 19:42:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 19529. [2022-11-16 19:42:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19529 states, 16212 states have (on average 1.4826054774241302) internal successors, (24036), 16309 states have internal predecessors, (24036), 2292 states have call successors, (2292), 1024 states have call predecessors, (2292), 1024 states have return successors, (3316), 2196 states have call predecessors, (3316), 2292 states have call successors, (3316) [2022-11-16 19:42:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19529 states to 19529 states and 29644 transitions. [2022-11-16 19:42:38,967 INFO L78 Accepts]: Start accepts. Automaton has 19529 states and 29644 transitions. Word has length 136 [2022-11-16 19:42:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:38,968 INFO L495 AbstractCegarLoop]: Abstraction has 19529 states and 29644 transitions. [2022-11-16 19:42:38,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19529 states and 29644 transitions. [2022-11-16 19:42:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 19:42:39,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:39,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 19:42:39,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2052238338, now seen corresponding path program 1 times [2022-11-16 19:42:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352888790] [2022-11-16 19:42:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 19:42:39,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:39,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352888790] [2022-11-16 19:42:39,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352888790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:39,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:42:39,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:42:39,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310229032] [2022-11-16 19:42:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:39,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:42:39,322 INFO L87 Difference]: Start difference. First operand 19529 states and 29644 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:42,644 INFO L93 Difference]: Finished difference Result 57870 states and 89537 transitions. [2022-11-16 19:42:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 136 [2022-11-16 19:42:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:42,844 INFO L225 Difference]: With dead ends: 57870 [2022-11-16 19:42:42,844 INFO L226 Difference]: Without dead ends: 38347 [2022-11-16 19:42:42,922 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 19:42:42,923 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 165 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:42,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 329 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38347 states. [2022-11-16 19:42:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38347 to 38121. [2022-11-16 19:42:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38121 states, 31652 states have (on average 1.470112473145457) internal successors, (46532), 31845 states have internal predecessors, (46532), 4420 states have call successors, (4420), 2048 states have call predecessors, (4420), 2048 states have return successors, (6340), 4228 states have call predecessors, (6340), 4420 states have call successors, (6340) [2022-11-16 19:42:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38121 states to 38121 states and 57292 transitions. [2022-11-16 19:42:46,412 INFO L78 Accepts]: Start accepts. Automaton has 38121 states and 57292 transitions. Word has length 136 [2022-11-16 19:42:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:46,413 INFO L495 AbstractCegarLoop]: Abstraction has 38121 states and 57292 transitions. [2022-11-16 19:42:46,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 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 19:42:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 38121 states and 57292 transitions. [2022-11-16 19:42:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 19:42:46,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:46,546 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:42:46,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 19:42:46,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:46,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1843786443, now seen corresponding path program 1 times [2022-11-16 19:42:46,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:46,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118616300] [2022-11-16 19:42:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:46,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-16 19:42:46,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118616300] [2022-11-16 19:42:46,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118616300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573037424] [2022-11-16 19:42:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:46,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:46,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:46,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:42:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 19:42:47,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:47,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573037424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:47,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:47,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:42:47,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2148192] [2022-11-16 19:42:47,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:47,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:47,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:47,165 INFO L87 Difference]: Start difference. First operand 38121 states and 57292 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 19:42:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:42:50,834 INFO L93 Difference]: Finished difference Result 71140 states and 106497 transitions. [2022-11-16 19:42:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:42:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 156 [2022-11-16 19:42:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:42:51,075 INFO L225 Difference]: With dead ends: 71140 [2022-11-16 19:42:51,075 INFO L226 Difference]: Without dead ends: 48610 [2022-11-16 19:42:51,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 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 19:42:51,186 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 157 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:42:51,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 230 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:42:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48610 states. [2022-11-16 19:42:55,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48610 to 48610. [2022-11-16 19:42:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48610 states, 41186 states have (on average 1.4203370077210702) internal successors, (58498), 41379 states have internal predecessors, (58498), 4737 states have call successors, (4737), 2685 states have call predecessors, (4737), 2686 states have return successors, (6911), 4546 states have call predecessors, (6911), 4737 states have call successors, (6911) [2022-11-16 19:42:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48610 states to 48610 states and 70146 transitions. [2022-11-16 19:42:55,334 INFO L78 Accepts]: Start accepts. Automaton has 48610 states and 70146 transitions. Word has length 156 [2022-11-16 19:42:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:42:55,335 INFO L495 AbstractCegarLoop]: Abstraction has 48610 states and 70146 transitions. [2022-11-16 19:42:55,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 19:42:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 48610 states and 70146 transitions. [2022-11-16 19:42:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 19:42:55,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:42:55,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:42:55,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:42:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:55,690 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:42:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:42:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1927860182, now seen corresponding path program 1 times [2022-11-16 19:42:55,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:42:55,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848701395] [2022-11-16 19:42:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:42:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-16 19:42:55,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:42:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848701395] [2022-11-16 19:42:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848701395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:42:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023438317] [2022-11-16 19:42:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:42:55,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:55,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:55,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:42:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:42:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 19:42:56,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 19:42:56,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:42:56,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023438317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:42:56,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:42:56,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 19:42:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101604190] [2022-11-16 19:42:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:42:56,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:42:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:42:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:42:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:42:56,247 INFO L87 Difference]: Start difference. First operand 48610 states and 70146 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 19:43:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:00,452 INFO L93 Difference]: Finished difference Result 93459 states and 136812 transitions. [2022-11-16 19:43:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:43:00,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 156 [2022-11-16 19:43:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:00,741 INFO L225 Difference]: With dead ends: 93459 [2022-11-16 19:43:00,742 INFO L226 Difference]: Without dead ends: 68609 [2022-11-16 19:43:00,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 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 19:43:00,839 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 126 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:00,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 452 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:43:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68609 states. [2022-11-16 19:43:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68609 to 56306. [2022-11-16 19:43:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56306 states, 48434 states have (on average 1.4614939918239254) internal successors, (70786), 48627 states have internal predecessors, (70786), 4961 states have call successors, (4961), 2909 states have call predecessors, (4961), 2910 states have return successors, (7135), 4770 states have call predecessors, (7135), 4961 states have call successors, (7135) [2022-11-16 19:43:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56306 states to 56306 states and 82882 transitions. [2022-11-16 19:43:05,861 INFO L78 Accepts]: Start accepts. Automaton has 56306 states and 82882 transitions. Word has length 156 [2022-11-16 19:43:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:05,862 INFO L495 AbstractCegarLoop]: Abstraction has 56306 states and 82882 transitions. [2022-11-16 19:43:05,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 19:43:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 56306 states and 82882 transitions. [2022-11-16 19:43:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-16 19:43:06,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:06,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:06,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:06,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:06,269 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:43:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1158313201, now seen corresponding path program 2 times [2022-11-16 19:43:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:43:06,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783414688] [2022-11-16 19:43:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:43:06,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:43:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:43:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 19:43:06,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:43:06,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783414688] [2022-11-16 19:43:06,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783414688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:43:06,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997754409] [2022-11-16 19:43:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:06,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:06,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:06,787 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:06,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3666054-744b-436a-8c03-3c08c6f0777f/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:43:07,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:43:07,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:07,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:43:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 19:43:07,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:43:07,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997754409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:43:07,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:43:07,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-16 19:43:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394884999] [2022-11-16 19:43:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:43:07,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:43:07,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:43:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:43:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:43:07,169 INFO L87 Difference]: Start difference. First operand 56306 states and 82882 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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)