./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta --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 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 --- 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-dbf71c6-m [2022-10-17 17:36:36,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:36,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:37,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:37,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:37,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:37,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:37,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:37,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:37,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:37,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:37,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:37,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:37,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:37,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:37,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:37,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:37,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:37,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:37,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:37,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:37,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:37,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:37,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:37,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:37,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:37,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:37,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:37,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:37,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:37,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:37,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:37,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:37,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:37,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:37,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:37,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:37,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:37,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:37,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:37,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:37,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:37,185 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:37,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:37,186 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:37,186 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:37,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:37,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:37,188 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:37,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:37,188 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:37,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:37,190 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:37,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:37,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:37,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:37,191 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:37,191 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:37,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:37,192 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:37,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:37,193 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:37,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:37,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:37,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:37,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:37,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:37,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:37,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:37,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:37,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:37,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:37,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:37,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:37,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:37,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:37,205 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:37,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:37,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:37,205 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:37,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:37,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:37,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:37,206 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_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ec37a095871269c822e7d35e6d840f2de134a68f657807281a5c0e96980df26 [2022-10-17 17:36:37,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:37,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:37,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:37,566 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:37,567 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:37,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2022-10-17 17:36:37,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/data/95b5cedad/98be6c966a4b4a6e92cb9fc5c09167d0/FLAG1b1be84a1 [2022-10-17 17:36:38,602 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:38,603 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c [2022-10-17 17:36:38,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/data/95b5cedad/98be6c966a4b4a6e92cb9fc5c09167d0/FLAG1b1be84a1 [2022-10-17 17:36:38,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/data/95b5cedad/98be6c966a4b4a6e92cb9fc5c09167d0 [2022-10-17 17:36:38,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:38,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:38,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:38,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:38,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:38,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:38" (1/1) ... [2022-10-17 17:36:38,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e1b41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:38, skipping insertion in model container [2022-10-17 17:36:38,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:38" (1/1) ... [2022-10-17 17:36:38,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:39,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:41,609 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_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c[380323,380336] [2022-10-17 17:36:41,640 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_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c[383339,383352] [2022-10-17 17:36:41,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:41,840 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:43,195 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_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c[380323,380336] [2022-10-17 17:36:43,208 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_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/sv-benchmarks/c/combinations/Problem05_label45+token_ring.03.cil-1.c[383339,383352] [2022-10-17 17:36:43,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:43,291 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:43,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43 WrapperNode [2022-10-17 17:36:43,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:43,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:43,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:43,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:43,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:43,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:43,939 INFO L138 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 12682 [2022-10-17 17:36:43,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:43,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:43,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:43,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:43,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:43,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,492 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:44,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:44,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:44,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:44,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (1/1) ... [2022-10-17 17:36:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:44,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:44,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-10-17 17:36:44,805 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-10-17 17:36:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:36:44,805 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:36:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-10-17 17:36:44,806 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-10-17 17:36:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-10-17 17:36:44,806 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-10-17 17:36:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-10-17 17:36:44,806 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-10-17 17:36:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-10-17 17:36:44,807 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-10-17 17:36:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-10-17 17:36:44,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-10-17 17:36:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:44,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:44,945 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:44,947 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:53,714 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:56,593 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:56,593 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-10-17 17:36:56,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:56 BoogieIcfgContainer [2022-10-17 17:36:56,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:56,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:56,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:56,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:56,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:38" (1/3) ... [2022-10-17 17:36:56,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25708410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:56, skipping insertion in model container [2022-10-17 17:36:56,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:43" (2/3) ... [2022-10-17 17:36:56,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25708410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:56, skipping insertion in model container [2022-10-17 17:36:56,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:56" (3/3) ... [2022-10-17 17:36:56,614 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.03.cil-1.c [2022-10-17 17:36:56,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:56,637 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:36:56,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:56,764 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;@834ae60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:56,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:36:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 1738 states, 1709 states have (on average 1.9748390871854886) internal successors, (3375), 1714 states have internal predecessors, (3375), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-10-17 17:36:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:36:56,796 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:56,796 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] [2022-10-17 17:36:56,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash -554508062, now seen corresponding path program 1 times [2022-10-17 17:36:56,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182499527] [2022-10-17 17:36:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:56,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:57,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182499527] [2022-10-17 17:36:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182499527] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:57,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:57,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021453450] [2022-10-17 17:36:57,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:36:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:57,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:36:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:36:57,252 INFO L87 Difference]: Start difference. First operand has 1738 states, 1709 states have (on average 1.9748390871854886) internal successors, (3375), 1714 states have internal predecessors, (3375), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:36:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:58,228 INFO L93 Difference]: Finished difference Result 3547 states and 6943 transitions. [2022-10-17 17:36:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:36:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-10-17 17:36:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:58,266 INFO L225 Difference]: With dead ends: 3547 [2022-10-17 17:36:58,266 INFO L226 Difference]: Without dead ends: 1808 [2022-10-17 17:36:58,278 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 [2022-10-17 17:36:58,283 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3490 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 6432 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:58,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 6432 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:36:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-10-17 17:36:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1807. [2022-10-17 17:36:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1761 states have (on average 1.9522998296422487) internal successors, (3438), 1765 states have internal predecessors, (3438), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-10-17 17:36:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3500 transitions. [2022-10-17 17:36:58,499 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3500 transitions. Word has length 41 [2022-10-17 17:36:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:58,500 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 3500 transitions. [2022-10-17 17:36:58,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:36:58,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3500 transitions. [2022-10-17 17:36:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:36:58,517 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:58,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:58,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:58,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash -604417362, now seen corresponding path program 1 times [2022-10-17 17:36:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458610843] [2022-10-17 17:36:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:36:58,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458610843] [2022-10-17 17:36:58,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458610843] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:58,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148885952] [2022-10-17 17:36:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:58,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:58,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:36:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:58,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:36:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:36:59,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:59,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148885952] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:59,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:59,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:36:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550173397] [2022-10-17 17:36:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:59,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:36:59,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:36:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:59,028 INFO L87 Difference]: Start difference. First operand 1807 states and 3500 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:59,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:59,512 INFO L93 Difference]: Finished difference Result 2122 states and 3949 transitions. [2022-10-17 17:36:59,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:36:59,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-10-17 17:36:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:59,535 INFO L225 Difference]: With dead ends: 2122 [2022-10-17 17:36:59,535 INFO L226 Difference]: Without dead ends: 1961 [2022-10-17 17:36:59,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:59,540 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 3374 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3374 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:59,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3374 Valid, 3301 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:36:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-10-17 17:36:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1955. [2022-10-17 17:36:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1873 states have (on average 1.9183128670581955) internal successors, (3593), 1878 states have internal predecessors, (3593), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-10-17 17:36:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 3703 transitions. [2022-10-17 17:36:59,636 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 3703 transitions. Word has length 74 [2022-10-17 17:36:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:59,636 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 3703 transitions. [2022-10-17 17:36:59,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:36:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 3703 transitions. [2022-10-17 17:36:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:36:59,641 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:59,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:59,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:59,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2036667664, now seen corresponding path program 1 times [2022-10-17 17:36:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405593544] [2022-10-17 17:36:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:37:00,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405593544] [2022-10-17 17:37:00,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405593544] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935456568] [2022-10-17 17:37:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:00,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:00,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:00,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:37:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:37:00,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:37:00,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:00,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935456568] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:00,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:00,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:37:00,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614098857] [2022-10-17 17:37:00,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:00,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:00,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:00,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:00,230 INFO L87 Difference]: Start difference. First operand 1955 states and 3703 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:37:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:00,680 INFO L93 Difference]: Finished difference Result 2560 states and 4558 transitions. [2022-10-17 17:37:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:00,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-10-17 17:37:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:00,697 INFO L225 Difference]: With dead ends: 2560 [2022-10-17 17:37:00,698 INFO L226 Difference]: Without dead ends: 2251 [2022-10-17 17:37:00,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:00,701 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3371 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3371 SdHoareTripleChecker+Valid, 3270 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:00,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3371 Valid, 3270 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:37:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2022-10-17 17:37:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2243. [2022-10-17 17:37:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2091 states have (on average 1.860832137733142) internal successors, (3891), 2098 states have internal predecessors, (3891), 102 states have call successors, (102), 49 states have call predecessors, (102), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-10-17 17:37:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 4093 transitions. [2022-10-17 17:37:00,805 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 4093 transitions. Word has length 74 [2022-10-17 17:37:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:00,806 INFO L495 AbstractCegarLoop]: Abstraction has 2243 states and 4093 transitions. [2022-10-17 17:37:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:37:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 4093 transitions. [2022-10-17 17:37:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:37:00,809 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:00,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:00,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:01,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:01,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash 770705902, now seen corresponding path program 1 times [2022-10-17 17:37:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:01,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378207327] [2022-10-17 17:37:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:37:01,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378207327] [2022-10-17 17:37:01,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378207327] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:01,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:01,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:37:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992798139] [2022-10-17 17:37:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:37:01,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:37:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:37:01,450 INFO L87 Difference]: Start difference. First operand 2243 states and 4093 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:37:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:02,641 INFO L93 Difference]: Finished difference Result 3547 states and 5884 transitions. [2022-10-17 17:37:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:37:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2022-10-17 17:37:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:02,670 INFO L225 Difference]: With dead ends: 3547 [2022-10-17 17:37:02,670 INFO L226 Difference]: Without dead ends: 2951 [2022-10-17 17:37:02,676 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 [2022-10-17 17:37:02,679 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 3607 mSDsluCounter, 10080 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3619 SdHoareTripleChecker+Valid, 12580 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:02,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3619 Valid, 12580 Invalid, 1163 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [104 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:37:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2022-10-17 17:37:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2787. [2022-10-17 17:37:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2499 states have (on average 1.776310524209684) internal successors, (4439), 2510 states have internal predecessors, (4439), 190 states have call successors, (190), 97 states have call predecessors, (190), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-10-17 17:37:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4817 transitions. [2022-10-17 17:37:02,862 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4817 transitions. Word has length 74 [2022-10-17 17:37:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:02,864 INFO L495 AbstractCegarLoop]: Abstraction has 2787 states and 4817 transitions. [2022-10-17 17:37:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-10-17 17:37:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4817 transitions. [2022-10-17 17:37:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:37:02,870 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:02,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:02,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:37:02,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash -534618991, now seen corresponding path program 1 times [2022-10-17 17:37:02,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:02,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275298349] [2022-10-17 17:37:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:37:03,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275298349] [2022-10-17 17:37:03,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275298349] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:03,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859735710] [2022-10-17 17:37:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:03,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:03,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:03,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:37:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:37:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 17:37:03,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:03,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859735710] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:03,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:03,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:37:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203291608] [2022-10-17 17:37:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:03,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:37:03,299 INFO L87 Difference]: Start difference. First operand 2787 states and 4817 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:37:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:03,898 INFO L93 Difference]: Finished difference Result 3674 states and 6046 transitions. [2022-10-17 17:37:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-10-17 17:37:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:03,924 INFO L225 Difference]: With dead ends: 3674 [2022-10-17 17:37:03,924 INFO L226 Difference]: Without dead ends: 3070 [2022-10-17 17:37:03,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:37:03,931 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 44 mSDsluCounter, 3395 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6376 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:04,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6376 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:37:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2022-10-17 17:37:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2939. [2022-10-17 17:37:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2635 states have (on average 1.7666034155597723) internal successors, (4655), 2646 states have internal predecessors, (4655), 198 states have call successors, (198), 105 states have call predecessors, (198), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-10-17 17:37:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 5049 transitions. [2022-10-17 17:37:04,197 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 5049 transitions. Word has length 87 [2022-10-17 17:37:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:04,198 INFO L495 AbstractCegarLoop]: Abstraction has 2939 states and 5049 transitions. [2022-10-17 17:37:04,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:37:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 5049 transitions. [2022-10-17 17:37:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:37:04,205 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:04,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:04,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-17 17:37:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:04,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2134626193, now seen corresponding path program 1 times [2022-10-17 17:37:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451565770] [2022-10-17 17:37:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-10-17 17:37:04,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:04,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451565770] [2022-10-17 17:37:04,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451565770] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:04,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:04,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972616843] [2022-10-17 17:37:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:04,524 INFO L87 Difference]: Start difference. First operand 2939 states and 5049 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:37:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:05,059 INFO L93 Difference]: Finished difference Result 4876 states and 7734 transitions. [2022-10-17 17:37:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 97 [2022-10-17 17:37:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:05,085 INFO L225 Difference]: With dead ends: 4876 [2022-10-17 17:37:05,086 INFO L226 Difference]: Without dead ends: 3583 [2022-10-17 17:37:05,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:05,092 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 3367 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:05,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 3301 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:37:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2022-10-17 17:37:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 3567. [2022-10-17 17:37:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3567 states, 3119 states have (on average 1.7015068932350113) internal successors, (5307), 3134 states have internal predecessors, (5307), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-10-17 17:37:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 5885 transitions. [2022-10-17 17:37:05,281 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 5885 transitions. Word has length 97 [2022-10-17 17:37:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:05,281 INFO L495 AbstractCegarLoop]: Abstraction has 3567 states and 5885 transitions. [2022-10-17 17:37:05,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:37:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 5885 transitions. [2022-10-17 17:37:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-10-17 17:37:05,290 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:05,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:37:05,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1770730894, now seen corresponding path program 1 times [2022-10-17 17:37:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:05,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222771384] [2022-10-17 17:37:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:05,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-10-17 17:37:05,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222771384] [2022-10-17 17:37:05,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222771384] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914364178] [2022-10-17 17:37:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:05,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:05,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:05,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e49fabb2-0366-4a9e-84ba-71ce0a08c8b9/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process