./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 29f58006f2dcb74445f74971d42059f9136b4de9a536aa3c519655ea459ca984 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:44:30,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:44:30,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:44:30,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:44:30,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:44:30,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:44:30,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:44:30,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:44:30,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:44:30,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:44:30,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:44:30,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:44:30,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:44:30,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:44:30,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:44:30,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:44:30,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:44:30,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:44:30,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:44:30,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:44:30,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:44:30,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:44:30,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:44:30,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:44:30,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:44:30,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:44:30,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:44:30,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:44:30,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:44:30,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:44:30,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:44:30,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:44:30,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:44:30,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:44:30,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:44:30,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:44:30,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:44:30,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:44:30,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:44:30,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:44:30,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:44:30,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:44:30,298 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:44:30,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:44:30,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:44:30,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:44:30,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:44:30,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:44:30,301 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:44:30,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:44:30,302 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:44:30,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:44:30,303 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:44:30,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:44:30,304 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:44:30,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:44:30,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:44:30,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:44:30,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:44:30,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:44:30,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:44:30,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:44:30,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:44:30,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:44:30,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:44:30,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:44:30,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:44:30,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:44:30,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:44:30,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:44:30,310 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:44:30,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:44:30,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:44:30,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:44:30,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:30,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:44:30,311 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:44:30,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:44:30,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:44:30,312 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:44:30,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:44:30,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:44:30,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:44:30,313 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_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29f58006f2dcb74445f74971d42059f9136b4de9a536aa3c519655ea459ca984 [2022-11-03 01:44:30,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:44:30,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:44:30,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:44:30,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:44:30,685 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:44:30,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c [2022-11-03 01:44:30,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/data/d68cc4e77/22114ccb9341436292a865643e91e2ca/FLAG94c8d01a3 [2022-11-03 01:44:31,881 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:44:31,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c [2022-11-03 01:44:31,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/data/d68cc4e77/22114ccb9341436292a865643e91e2ca/FLAG94c8d01a3 [2022-11-03 01:44:32,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/data/d68cc4e77/22114ccb9341436292a865643e91e2ca [2022-11-03 01:44:32,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:44:32,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:44:32,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:32,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:44:32,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:44:32,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:32" (1/1) ... [2022-11-03 01:44:32,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f2f274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:32, skipping insertion in model container [2022-11-03 01:44:32,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:44:32" (1/1) ... [2022-11-03 01:44:32,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:44:32,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:44:34,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c[382357,382370] [2022-11-03 01:44:34,915 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c[383339,383352] [2022-11-03 01:44:35,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:35,320 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:44:36,560 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c[382357,382370] [2022-11-03 01:44:36,567 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/sv-benchmarks/c/combinations/Problem05_label46+token_ring.13.cil-2.c[383339,383352] [2022-11-03 01:44:36,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:44:36,681 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:44:36,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36 WrapperNode [2022-11-03 01:44:36,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:44:36,683 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:36,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:44:36,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:44:36,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:36,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,297 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13257 [2022-11-03 01:44:37,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:44:37,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:44:37,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:44:37,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:44:37,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,898 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:37,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:38,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:44:38,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:44:38,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:44:38,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:44:38,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (1/1) ... [2022-11-03 01:44:38,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:44:38,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:38,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:44:38,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:44:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:44:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:44:38,102 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:44:38,102 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:44:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:44:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:44:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:44:38,103 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:44:38,103 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:44:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:44:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:44:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:44:38,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:44:38,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:44:38,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:44:38,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:44:38,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:44:38,278 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:44:47,366 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:44:50,040 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:44:50,040 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-03 01:44:50,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:50 BoogieIcfgContainer [2022-11-03 01:44:50,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:44:50,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:44:50,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:44:50,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:44:50,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:44:32" (1/3) ... [2022-11-03 01:44:50,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eac4b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:50, skipping insertion in model container [2022-11-03 01:44:50,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:44:36" (2/3) ... [2022-11-03 01:44:50,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eac4b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:44:50, skipping insertion in model container [2022-11-03 01:44:50,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:44:50" (3/3) ... [2022-11-03 01:44:50,058 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.13.cil-2.c [2022-11-03 01:44:50,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:44:50,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:44:50,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:44:50,196 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;@689d7bec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:44:50,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:44:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 01:44:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 01:44:50,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:50,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:50,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:50,229 INFO L85 PathProgramCache]: Analyzing trace with hash -467274888, now seen corresponding path program 1 times [2022-11-03 01:44:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956721439] [2022-11-03 01:44:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:50,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956721439] [2022-11-03 01:44:50,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956721439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:50,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:44:50,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:44:50,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258521747] [2022-11-03 01:44:50,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:50,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:44:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:44:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:44:50,955 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:44:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:52,069 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2022-11-03 01:44:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:44:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 70 [2022-11-03 01:44:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:52,092 INFO L225 Difference]: With dead ends: 3866 [2022-11-03 01:44:52,092 INFO L226 Difference]: Without dead ends: 2023 [2022-11-03 01:44:52,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:44:52,106 INFO L413 NwaCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3753 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:52,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:44:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-03 01:44:52,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2022-11-03 01:44:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 01:44:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2022-11-03 01:44:52,287 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2022-11-03 01:44:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:52,288 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2022-11-03 01:44:52,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:44:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2022-11-03 01:44:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:44:52,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:52,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:44:52,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:52,312 INFO L85 PathProgramCache]: Analyzing trace with hash 895343619, now seen corresponding path program 1 times [2022-11-03 01:44:52,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:52,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637457627] [2022-11-03 01:44:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:44:52,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637457627] [2022-11-03 01:44:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637457627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538303929] [2022-11-03 01:44:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:52,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:52,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:52,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:44:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:44:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 01:44:53,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:53,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538303929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:53,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:53,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:44:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681314064] [2022-11-03 01:44:53,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:53,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:53,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:53,231 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:53,827 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2022-11-03 01:44:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 143 [2022-11-03 01:44:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:53,844 INFO L225 Difference]: With dead ends: 2767 [2022-11-03 01:44:53,845 INFO L226 Difference]: Without dead ends: 2391 [2022-11-03 01:44:53,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:53,850 INFO L413 NwaCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:53,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:44:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-03 01:44:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2022-11-03 01:44:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 01:44:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2022-11-03 01:44:53,944 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2022-11-03 01:44:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:53,945 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2022-11-03 01:44:53,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2022-11-03 01:44:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:44:53,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:53,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:53,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 01:44:54,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 309325829, now seen corresponding path program 1 times [2022-11-03 01:44:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338031808] [2022-11-03 01:44:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:44:54,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:54,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338031808] [2022-11-03 01:44:54,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338031808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569102924] [2022-11-03 01:44:54,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:54,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:54,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:54,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:44:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:44:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:44:54,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:54,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569102924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:54,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:54,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:44:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795703605] [2022-11-03 01:44:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:54,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:54,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:54,868 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:55,649 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2022-11-03 01:44:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 143 [2022-11-03 01:44:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:55,666 INFO L225 Difference]: With dead ends: 3856 [2022-11-03 01:44:55,666 INFO L226 Difference]: Without dead ends: 3115 [2022-11-03 01:44:55,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:55,675 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:55,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:44:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-03 01:44:55,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2022-11-03 01:44:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-03 01:44:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2022-11-03 01:44:55,812 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2022-11-03 01:44:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:55,814 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2022-11-03 01:44:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2022-11-03 01:44:55,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:44:55,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:55,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:55,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 01:44:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:56,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash -32894713, now seen corresponding path program 1 times [2022-11-03 01:44:56,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640771508] [2022-11-03 01:44:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:44:56,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640771508] [2022-11-03 01:44:56,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640771508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237323796] [2022-11-03 01:44:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:56,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:56,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:56,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:56,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:44:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:44:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:44:56,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:56,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237323796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:56,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:56,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:44:56,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155889594] [2022-11-03 01:44:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:56,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:56,647 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:57,292 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2022-11-03 01:44:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 143 [2022-11-03 01:44:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:57,321 INFO L225 Difference]: With dead ends: 6010 [2022-11-03 01:44:57,322 INFO L226 Difference]: Without dead ends: 4547 [2022-11-03 01:44:57,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:57,331 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:57,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:44:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2022-11-03 01:44:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2022-11-03 01:44:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-03 01:44:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2022-11-03 01:44:57,548 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2022-11-03 01:44:57,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:57,548 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2022-11-03 01:44:57,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2022-11-03 01:44:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:44:57,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:57,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:57,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:57,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:57,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1194577545, now seen corresponding path program 1 times [2022-11-03 01:44:57,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:57,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849441852] [2022-11-03 01:44:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:44:58,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849441852] [2022-11-03 01:44:58,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849441852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:58,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275905043] [2022-11-03 01:44:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:58,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:58,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:58,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:44:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:44:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 01:44:58,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:44:58,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275905043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:44:58,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:44:58,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:44:58,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901203145] [2022-11-03 01:44:58,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:44:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:44:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:44:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:58,393 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:59,106 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2022-11-03 01:44:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:44:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 143 [2022-11-03 01:44:59,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:59,156 INFO L225 Difference]: With dead ends: 10270 [2022-11-03 01:44:59,156 INFO L226 Difference]: Without dead ends: 7379 [2022-11-03 01:44:59,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:44:59,175 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:59,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:44:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-11-03 01:44:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2022-11-03 01:44:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-03 01:44:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2022-11-03 01:44:59,846 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2022-11-03 01:44:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:59,847 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2022-11-03 01:44:59,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:44:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2022-11-03 01:44:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:44:59,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:59,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:59,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:00,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:00,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1363302901, now seen corresponding path program 1 times [2022-11-03 01:45:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:00,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007849471] [2022-11-03 01:45:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:45:00,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007849471] [2022-11-03 01:45:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007849471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291665897] [2022-11-03 01:45:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:00,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:00,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:00,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:00,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:45:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:45:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 01:45:00,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:00,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291665897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:00,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:45:00,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:45:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567283124] [2022-11-03 01:45:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:00,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:45:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:45:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:00,652 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:01,714 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2022-11-03 01:45:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:45:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 143 [2022-11-03 01:45:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:01,791 INFO L225 Difference]: With dead ends: 18694 [2022-11-03 01:45:01,791 INFO L226 Difference]: Without dead ends: 12979 [2022-11-03 01:45:01,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:01,826 INFO L413 NwaCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:01,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:45:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2022-11-03 01:45:02,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2022-11-03 01:45:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-03 01:45:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2022-11-03 01:45:02,743 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2022-11-03 01:45:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:02,747 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2022-11-03 01:45:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2022-11-03 01:45:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:45:02,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:02,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:02,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:02,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:02,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:02,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1869904055, now seen corresponding path program 1 times [2022-11-03 01:45:02,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:02,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953498612] [2022-11-03 01:45:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:45:03,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953498612] [2022-11-03 01:45:03,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953498612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:03,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115359450] [2022-11-03 01:45:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:03,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:03,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:03,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:45:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:03,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:45:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:45:03,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:03,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115359450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:03,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:45:03,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:45:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965320997] [2022-11-03 01:45:03,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:03,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:45:03,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:45:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:03,590 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:04,969 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2022-11-03 01:45:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:45:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 143 [2022-11-03 01:45:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:05,083 INFO L225 Difference]: With dead ends: 35350 [2022-11-03 01:45:05,083 INFO L226 Difference]: Without dead ends: 24051 [2022-11-03 01:45:05,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:05,129 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:05,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:45:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-11-03 01:45:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2022-11-03 01:45:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-03 01:45:06,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2022-11-03 01:45:06,531 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2022-11-03 01:45:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:06,531 INFO L495 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2022-11-03 01:45:06,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2022-11-03 01:45:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:45:06,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:06,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:06,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:45:06,798 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1015843079, now seen corresponding path program 1 times [2022-11-03 01:45:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311554623] [2022-11-03 01:45:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:45:07,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:07,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311554623] [2022-11-03 01:45:07,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311554623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:45:07,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322165429] [2022-11-03 01:45:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:07,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:07,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:45:07,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:45:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:45:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 01:45:07,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322165429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:07,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:45:07,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:45:07,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59075994] [2022-11-03 01:45:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:07,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:45:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:45:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:07,378 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:10,227 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2022-11-03 01:45:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:45:10,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 143 [2022-11-03 01:45:10,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:10,512 INFO L225 Difference]: With dead ends: 68278 [2022-11-03 01:45:10,512 INFO L226 Difference]: Without dead ends: 45939 [2022-11-03 01:45:10,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:10,583 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:10,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:45:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2022-11-03 01:45:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2022-11-03 01:45:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-03 01:45:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2022-11-03 01:45:13,559 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2022-11-03 01:45:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:13,560 INFO L495 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2022-11-03 01:45:13,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:45:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2022-11-03 01:45:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 01:45:13,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:13,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:13,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c47fb9d5-1df9-470f-a0e2-e97339f4dd29/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 01:45:13,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:13,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -359918711, now seen corresponding path program 1 times [2022-11-03 01:45:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786334602] [2022-11-03 01:45:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 01:45:14,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:14,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786334602] [2022-11-03 01:45:14,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786334602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:14,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:14,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:45:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355664076] [2022-11-03 01:45:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:14,939 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:45:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:21,259 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2022-11-03 01:45:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:45:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-03 01:45:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:22,026 INFO L225 Difference]: With dead ends: 156917 [2022-11-03 01:45:22,026 INFO L226 Difference]: Without dead ends: 112755 [2022-11-03 01:45:22,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:45:22,148 INFO L413 NwaCegarLoop]: 3329 mSDtfsCounter, 4482 mSDsluCounter, 7126 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 9930 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:22,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 9930 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 01:45:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2022-11-03 01:45:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2022-11-03 01:45:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-03 01:45:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2022-11-03 01:45:28,403 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2022-11-03 01:45:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:28,405 INFO L495 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2022-11-03 01:45:28,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:45:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2022-11-03 01:45:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 01:45:28,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:28,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:45:28,588 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2108141672, now seen corresponding path program 1 times [2022-11-03 01:45:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:45:28,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28620739] [2022-11-03 01:45:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:45:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 01:45:29,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:45:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28620739] [2022-11-03 01:45:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28620739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:29,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:29,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:45:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249252715] [2022-11-03 01:45:29,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:45:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:45:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:45:29,324 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 01:45:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:38,587 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2022-11-03 01:45:38,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:45:38,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-03 01:45:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted.