./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/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_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/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 64bit --witnessprinter.graph.data.programhash 16a45ff550c912548b6ea863a62264e11925b5b01e108e129370b7b6a2adee8d --- 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 02:27:21,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:21,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:21,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:21,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:21,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:21,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:21,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:21,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:21,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:21,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:21,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:21,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:21,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:21,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:21,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:21,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:21,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:21,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:21,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:21,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:21,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:21,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:21,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:21,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:21,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:21,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:21,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:21,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:21,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:21,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:21,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:21,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:21,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:21,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:21,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:21,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:21,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:21,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:21,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:21,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:21,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:27:21,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:21,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:21,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:21,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:21,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:21,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:21,302 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:21,302 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:21,302 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:21,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:21,303 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:21,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:21,303 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:21,304 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:21,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:21,304 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:21,304 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:21,305 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:21,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:21,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:21,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:21,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:21,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:21,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:21,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:21,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:21,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:21,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:21,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:21,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:21,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:21,309 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:21,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:21,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:21,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:21,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:21,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:21,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:21,310 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_c238b524-4869-407a-906f-b0c8f1e91b0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16a45ff550c912548b6ea863a62264e11925b5b01e108e129370b7b6a2adee8d [2022-11-03 02:27:21,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:21,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:21,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:21,608 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:21,609 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:21,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:21,697 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/6512226e2/3465ebc7b45249bd88fa14d45cac16e6/FLAG5f1079757 [2022-11-03 02:27:22,286 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:22,287 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:22,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/6512226e2/3465ebc7b45249bd88fa14d45cac16e6/FLAG5f1079757 [2022-11-03 02:27:22,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/6512226e2/3465ebc7b45249bd88fa14d45cac16e6 [2022-11-03 02:27:22,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:22,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:22,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:22,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:22,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:22,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:22" (1/1) ... [2022-11-03 02:27:22,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1578174c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:22, skipping insertion in model container [2022-11-03 02:27:22,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:22" (1/1) ... [2022-11-03 02:27:22,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:22,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:22,842 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_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:27:23,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:23,129 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:23,140 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_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:27:23,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:23,275 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:23,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23 WrapperNode [2022-11-03 02:27:23,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:23,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:23,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:23,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:23,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,487 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1165 [2022-11-03 02:27:23,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:23,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:23,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:23,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:23,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,660 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:23,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:23,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:23,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:23,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (1/1) ... [2022-11-03 02:27:23,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:23,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:23,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:24,113 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:24,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:38,044 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:48,853 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:48,853 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:27:48,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:48 BoogieIcfgContainer [2022-11-03 02:27:48,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:48,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:48,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:48,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:48,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:22" (1/3) ... [2022-11-03 02:27:48,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20085200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:48, skipping insertion in model container [2022-11-03 02:27:48,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:23" (2/3) ... [2022-11-03 02:27:48,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20085200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:48, skipping insertion in model container [2022-11-03 02:27:48,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:48" (3/3) ... [2022-11-03 02:27:48,869 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:48,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:48,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:48,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:48,950 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;@34478eb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:48,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:27:48,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:48,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:27:48,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash 7949297, now seen corresponding path program 1 times [2022-11-03 02:27:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769978725] [2022-11-03 02:27:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:27:49,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:27:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:27:49,876 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:27:49,879 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:27:49,881 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:27:49,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:49,888 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:27:49,893 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:27:49,929 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:27:49,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:27:49 BoogieIcfgContainer [2022-11-03 02:27:49,942 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:27:49,945 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:27:49,945 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:27:49,946 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:27:49,947 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:48" (3/4) ... [2022-11-03 02:27:49,951 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:27:49,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:27:49,954 INFO L158 Benchmark]: Toolchain (without parser) took 27377.69ms. Allocated memory was 115.3MB in the beginning and 2.7GB in the end (delta: 2.5GB). Free memory was 79.6MB in the beginning and 2.5GB in the end (delta: -2.5GB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. [2022-11-03 02:27:49,954 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory was 54.2MB in the beginning and 54.2MB in the end (delta: 21.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:49,956 INFO L158 Benchmark]: CACSL2BoogieTranslator took 698.20ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 65.0MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:27:49,957 INFO L158 Benchmark]: Boogie Procedure Inliner took 211.61ms. Allocated memory is still 115.3MB. Free memory was 65.0MB in the beginning and 78.1MB in the end (delta: -13.1MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. [2022-11-03 02:27:49,961 INFO L158 Benchmark]: Boogie Preprocessor took 211.34ms. Allocated memory is still 115.3MB. Free memory was 78.1MB in the beginning and 70.2MB in the end (delta: 7.9MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2022-11-03 02:27:49,961 INFO L158 Benchmark]: RCFGBuilder took 25155.37ms. Allocated memory was 115.3MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 70.2MB in the beginning and 599.4MB in the end (delta: -529.2MB). Peak memory consumption was 922.7MB. Max. memory is 16.1GB. [2022-11-03 02:27:49,962 INFO L158 Benchmark]: TraceAbstraction took 1084.14ms. Allocated memory was 1.5GB in the beginning and 2.7GB in the end (delta: 1.1GB). Free memory was 598.3MB in the beginning and 2.5GB in the end (delta: -1.9GB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:49,962 INFO L158 Benchmark]: Witness Printer took 6.54ms. Allocated memory is still 2.7GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:27:49,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 79.7MB. Free memory was 54.2MB in the beginning and 54.2MB in the end (delta: 21.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 698.20ms. Allocated memory is still 115.3MB. Free memory was 79.6MB in the beginning and 65.0MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 211.61ms. Allocated memory is still 115.3MB. Free memory was 65.0MB in the beginning and 78.1MB in the end (delta: -13.1MB). Peak memory consumption was 42.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 211.34ms. Allocated memory is still 115.3MB. Free memory was 78.1MB in the beginning and 70.2MB in the end (delta: 7.9MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * RCFGBuilder took 25155.37ms. Allocated memory was 115.3MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 70.2MB in the beginning and 599.4MB in the end (delta: -529.2MB). Peak memory consumption was 922.7MB. Max. memory is 16.1GB. * TraceAbstraction took 1084.14ms. Allocated memory was 1.5GB in the beginning and 2.7GB in the end (delta: 1.1GB). Free memory was 598.3MB in the beginning and 2.5GB in the end (delta: -1.9GB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.54ms. Allocated memory is still 2.7GB. Free memory was 2.5GB in the beginning and 2.5GB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 170, overapproximation of bitwiseAnd at line 126. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_22 = 0; [L39] const SORT_4 var_45 = 1; [L40] const SORT_4 var_46 = 0; [L41] const SORT_2 var_54 = 0; [L42] const SORT_2 var_56 = 1; [L43] const SORT_3 var_66 = 0; [L44] const SORT_4 var_153 = 2; [L45] const SORT_2 var_165 = 2; [L46] const SORT_4 var_167 = 6; [L48] SORT_1 input_53; [L49] SORT_1 input_55; [L50] SORT_1 input_60; [L51] SORT_1 input_61; [L52] SORT_1 input_65; [L53] SORT_1 input_73; [L54] SORT_1 input_80; [L55] SORT_1 input_84; [L56] SORT_1 input_85; [L57] SORT_1 input_97; [L58] SORT_1 input_101; [L59] SORT_1 input_102; [L60] SORT_1 input_121; [L61] SORT_1 input_124; [L62] SORT_1 input_140; [L63] SORT_1 input_143; [L65] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L66] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L67] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L68] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L69] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L70] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L71] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L72] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L73] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L74] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_2 init_7_arg_1 = var_5; [L86] state_6 = init_7_arg_1 [L87] SORT_2 init_9_arg_1 = var_5; [L88] state_8 = init_9_arg_1 [L89] SORT_2 init_11_arg_1 = var_5; [L90] state_10 = init_11_arg_1 [L91] SORT_2 init_13_arg_1 = var_5; [L92] state_12 = init_13_arg_1 [L93] SORT_2 init_15_arg_1 = var_5; [L94] state_14 = init_15_arg_1 [L95] SORT_2 init_17_arg_1 = var_5; [L96] state_16 = init_17_arg_1 [L97] SORT_2 init_19_arg_1 = var_5; [L98] state_18 = init_19_arg_1 [L99] SORT_2 init_21_arg_1 = var_5; [L100] state_20 = init_21_arg_1 [L101] SORT_1 init_24_arg_1 = var_22; [L102] state_23 = init_24_arg_1 [L103] SORT_1 init_26_arg_1 = var_22; [L104] state_25 = init_26_arg_1 [L105] SORT_1 init_28_arg_1 = var_22; [L106] state_27 = init_28_arg_1 [L107] SORT_1 init_30_arg_1 = var_22; [L108] state_29 = init_30_arg_1 [L109] SORT_1 init_32_arg_1 = var_22; [L110] state_31 = init_32_arg_1 [L111] SORT_1 init_34_arg_1 = var_22; [L112] state_33 = init_34_arg_1 [L113] SORT_1 init_36_arg_1 = var_22; [L114] state_35 = init_36_arg_1 [L115] SORT_1 init_38_arg_1 = var_22; [L116] state_37 = init_38_arg_1 [L117] SORT_1 init_40_arg_1 = var_22; [L118] state_39 = init_40_arg_1 [L119] SORT_1 init_42_arg_1 = var_22; [L120] state_41 = init_42_arg_1 [L121] SORT_1 init_44_arg_1 = var_22; [L122] state_43 = init_44_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_6=0, state_8=0, var_153=2, var_165=2, var_167=6, var_22=0, var_45=1, var_46=0, var_5=0, var_54=0, var_56=1, var_66=0] [L125] input_53 = __VERIFIER_nondet_uchar() [L126] input_53 = input_53 & mask_SORT_1 [L127] input_55 = __VERIFIER_nondet_uchar() [L128] input_55 = input_55 & mask_SORT_1 [L129] input_60 = __VERIFIER_nondet_uchar() [L130] input_60 = input_60 & mask_SORT_1 [L131] input_61 = __VERIFIER_nondet_uchar() [L132] input_61 = input_61 & mask_SORT_1 [L133] input_65 = __VERIFIER_nondet_uchar() [L134] input_65 = input_65 & mask_SORT_1 [L135] input_73 = __VERIFIER_nondet_uchar() [L136] input_73 = input_73 & mask_SORT_1 [L137] input_80 = __VERIFIER_nondet_uchar() [L138] input_80 = input_80 & mask_SORT_1 [L139] input_84 = __VERIFIER_nondet_uchar() [L140] input_84 = input_84 & mask_SORT_1 [L141] input_85 = __VERIFIER_nondet_uchar() [L142] input_85 = input_85 & mask_SORT_1 [L143] input_97 = __VERIFIER_nondet_uchar() [L144] input_97 = input_97 & mask_SORT_1 [L145] input_101 = __VERIFIER_nondet_uchar() [L146] input_101 = input_101 & mask_SORT_1 [L147] input_102 = __VERIFIER_nondet_uchar() [L148] input_102 = input_102 & mask_SORT_1 [L149] input_121 = __VERIFIER_nondet_uchar() [L150] input_124 = __VERIFIER_nondet_uchar() [L151] input_140 = __VERIFIER_nondet_uchar() [L152] input_143 = __VERIFIER_nondet_uchar() [L155] SORT_1 var_47_arg_0 = state_31; [L156] SORT_4 var_47_arg_1 = var_45; [L157] SORT_4 var_47_arg_2 = var_46; [L158] EXPR var_47_arg_0 ? var_47_arg_1 : var_47_arg_2 [L158] SORT_4 var_47 = var_47_arg_0 ? var_47_arg_1 : var_47_arg_2; [L159] SORT_1 var_48_arg_0 = state_41; [L160] SORT_4 var_48_arg_1 = var_45; [L161] SORT_4 var_48_arg_2 = var_46; [L162] EXPR var_48_arg_0 ? var_48_arg_1 : var_48_arg_2 [L162] SORT_4 var_48 = var_48_arg_0 ? var_48_arg_1 : var_48_arg_2; [L163] SORT_4 var_49_arg_0 = var_47; [L164] SORT_4 var_49_arg_1 = var_48; [L165] SORT_4 var_49 = var_49_arg_0 + var_49_arg_1; [L166] var_49 = var_49 & mask_SORT_4 [L167] SORT_4 var_50_arg_0 = var_49; [L168] SORT_4 var_50_arg_1 = var_45; [L169] SORT_1 var_50 = var_50_arg_0 <= var_50_arg_1; [L170] SORT_1 var_51_arg_0 = ~state_43; [L171] var_51_arg_0 = var_51_arg_0 & mask_SORT_1 [L172] SORT_1 var_51_arg_1 = ~var_50; [L173] var_51_arg_1 = var_51_arg_1 & mask_SORT_1 [L174] SORT_1 var_51 = var_51_arg_0 & var_51_arg_1; [L175] var_51 = var_51 & mask_SORT_1 [L176] SORT_1 bad_52_arg_0 = var_51; [L177] CALL __VERIFIER_assert(!(bad_52_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:27:49,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/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_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/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 64bit --witnessprinter.graph.data.programhash 16a45ff550c912548b6ea863a62264e11925b5b01e108e129370b7b6a2adee8d --- 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 02:27:52,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:52,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:52,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:52,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:52,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:52,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:52,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:52,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:52,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:52,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:52,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:52,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:52,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:52,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:52,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:52,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:52,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:52,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:52,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:52,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:52,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:52,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:52,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:52,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:52,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:52,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:52,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:52,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:52,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:52,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:52,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:52,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:52,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:52,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:52,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:52,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:52,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:52,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:52,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:52,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:52,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:27:52,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:52,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:52,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:52,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:52,483 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:52,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:52,483 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:52,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:52,483 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:52,484 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:52,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:52,485 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:52,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:52,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:52,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:52,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:52,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:52,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:27:52,488 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:27:52,488 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:27:52,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:52,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:52,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:52,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:52,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:27:52,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:52,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:52,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:52,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:52,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:52,490 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:27:52,491 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:27:52,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:52,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:52,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:27:52,492 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c238b524-4869-407a-906f-b0c8f1e91b0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16a45ff550c912548b6ea863a62264e11925b5b01e108e129370b7b6a2adee8d [2022-11-03 02:27:52,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:52,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:52,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:52,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:52,864 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:52,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:52,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/d8101efd9/84c446af5b53414ca2fb50c78075f682/FLAGda17b7513 [2022-11-03 02:27:53,587 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:53,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:53,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/d8101efd9/84c446af5b53414ca2fb50c78075f682/FLAGda17b7513 [2022-11-03 02:27:53,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/data/d8101efd9/84c446af5b53414ca2fb50c78075f682 [2022-11-03 02:27:53,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:53,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:53,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:53,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:53,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:53,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:53" (1/1) ... [2022-11-03 02:27:53,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224f0267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:53, skipping insertion in model container [2022-11-03 02:27:53,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:53" (1/1) ... [2022-11-03 02:27:53,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:53,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:54,134 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_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:27:54,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:54,433 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:54,445 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_c238b524-4869-407a-906f-b0c8f1e91b0b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.2.prop1-func-interl.c[1014,1027] [2022-11-03 02:27:54,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:54,576 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:54,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54 WrapperNode [2022-11-03 02:27:54,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:54,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:54,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:54,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:54,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,731 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1165 [2022-11-03 02:27:54,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:54,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:54,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:54,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:54,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:54,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:54,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:54,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:54,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (1/1) ... [2022-11-03 02:27:54,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:54,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:54,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:54,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:54,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:54,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:55,316 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:55,318 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:56,362 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:56,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:56,372 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:27:56,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:56 BoogieIcfgContainer [2022-11-03 02:27:56,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:56,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:56,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:56,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:56,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:53" (1/3) ... [2022-11-03 02:27:56,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a054c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:56, skipping insertion in model container [2022-11-03 02:27:56,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:54" (2/3) ... [2022-11-03 02:27:56,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a054c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:56, skipping insertion in model container [2022-11-03 02:27:56,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:56" (3/3) ... [2022-11-03 02:27:56,384 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.2.prop1-func-interl.c [2022-11-03 02:27:56,403 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:56,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:56,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:56,486 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;@4ecba346, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:56,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:27:56,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:56,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:56,501 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:56,508 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 02:27:56,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641358231] [2022-11-03 02:27:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:56,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:56,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:56,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:56,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:27:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:27:56,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:56,925 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 02:27:56,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:56,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:56,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641358231] [2022-11-03 02:27:56,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641358231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:56,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:56,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:56,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886803735] [2022-11-03 02:27:56,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:56,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:56,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:27:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:56,974 INFO L87 Difference]: Start difference. First operand has 67 states, 65 states have (on average 1.4923076923076923) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:57,223 INFO L93 Difference]: Finished difference Result 249 states and 371 transitions. [2022-11-03 02:27:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:27:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:57,239 INFO L225 Difference]: With dead ends: 249 [2022-11-03 02:27:57,239 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 02:27:57,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:57,250 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 259 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:57,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 343 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:27:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 02:27:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 65. [2022-11-03 02:27:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 93 transitions. [2022-11-03 02:27:57,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 93 transitions. Word has length 9 [2022-11-03 02:27:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:57,313 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 93 transitions. [2022-11-03 02:27:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 93 transitions. [2022-11-03 02:27:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:27:57,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:57,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:57,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:27:57,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:27:57,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 02:27:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393820521] [2022-11-03 02:27:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:57,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:57,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:57,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:57,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:27:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:27:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:57,823 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 02:27:57,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:57,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:57,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393820521] [2022-11-03 02:27:57,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393820521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:57,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:57,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:57,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433785223] [2022-11-03 02:27:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:27:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:57,834 INFO L87 Difference]: Start difference. First operand 65 states and 93 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:58,002 INFO L93 Difference]: Finished difference Result 245 states and 355 transitions. [2022-11-03 02:27:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:27:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:58,006 INFO L225 Difference]: With dead ends: 245 [2022-11-03 02:27:58,006 INFO L226 Difference]: Without dead ends: 184 [2022-11-03 02:27:58,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:58,007 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 253 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:58,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 345 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-03 02:27:58,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 67. [2022-11-03 02:27:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2022-11-03 02:27:58,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 9 [2022-11-03 02:27:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:58,018 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2022-11-03 02:27:58,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2022-11-03 02:27:58,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:27:58,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:58,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:58,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:58,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:27:58,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 02:27:58,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:58,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206633336] [2022-11-03 02:27:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:58,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:58,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:58,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:27:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:27:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:58,803 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 02:27:58,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:58,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:27:58,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206633336] [2022-11-03 02:27:58,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206633336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:58,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:58,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:27:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641826855] [2022-11-03 02:27:58,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:58,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:27:58,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:27:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:27:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:27:58,806 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:59,341 INFO L93 Difference]: Finished difference Result 196 states and 281 transitions. [2022-11-03 02:27:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:27:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:27:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:59,343 INFO L225 Difference]: With dead ends: 196 [2022-11-03 02:27:59,343 INFO L226 Difference]: Without dead ends: 194 [2022-11-03 02:27:59,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:27:59,344 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 427 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:59,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 495 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:27:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-03 02:27:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 71. [2022-11-03 02:27:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-11-03 02:27:59,358 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 9 [2022-11-03 02:27:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:59,358 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-11-03 02:27:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-11-03 02:27:59,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:27:59,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:59,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:59,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:27:59,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:59,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1532815515, now seen corresponding path program 1 times [2022-11-03 02:27:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:27:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955939284] [2022-11-03 02:27:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:59,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:27:59,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:27:59,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:27:59,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:28:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:28:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:00,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:00,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955939284] [2022-11-03 02:28:00,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955939284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:00,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:00,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:28:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313306877] [2022-11-03 02:28:00,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:28:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:00,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:28:00,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:28:00,346 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:00,460 INFO L93 Difference]: Finished difference Result 152 states and 217 transitions. [2022-11-03 02:28:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:28:00,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:00,462 INFO L225 Difference]: With dead ends: 152 [2022-11-03 02:28:00,462 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:28:00,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:28:00,464 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 13 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:00,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 484 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-03 02:28:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:28:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-03 02:28:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 86 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-11-03 02:28:00,471 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 68 [2022-11-03 02:28:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:00,472 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-11-03 02:28:00,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-11-03 02:28:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:00,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:00,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:00,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:00,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:00,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1179727133, now seen corresponding path program 1 times [2022-11-03 02:28:00,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:00,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458269515] [2022-11-03 02:28:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:00,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:00,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:28:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:28:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:01,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:01,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:01,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458269515] [2022-11-03 02:28:01,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458269515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:01,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:01,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:28:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3656947] [2022-11-03 02:28:01,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:28:01,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:28:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:28:01,464 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:01,576 INFO L93 Difference]: Finished difference Result 176 states and 252 transitions. [2022-11-03 02:28:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:28:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:01,578 INFO L225 Difference]: With dead ends: 176 [2022-11-03 02:28:01,578 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 02:28:01,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:28:01,579 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 33 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:01,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 404 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-03 02:28:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 02:28:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-03 02:28:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4272727272727272) internal successors, (157), 110 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 157 transitions. [2022-11-03 02:28:01,586 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 157 transitions. Word has length 68 [2022-11-03 02:28:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:01,586 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 157 transitions. [2022-11-03 02:28:01,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 157 transitions. [2022-11-03 02:28:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:01,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:01,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:01,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:01,806 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1729036769, now seen corresponding path program 1 times [2022-11-03 02:28:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:01,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595112361] [2022-11-03 02:28:01,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:01,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:01,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:01,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:28:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:28:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:02,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:28:02,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:02,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595112361] [2022-11-03 02:28:02,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595112361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:02,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:02,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:28:02,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999551877] [2022-11-03 02:28:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:28:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:28:02,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:28:02,695 INFO L87 Difference]: Start difference. First operand 111 states and 157 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:02,803 INFO L93 Difference]: Finished difference Result 234 states and 336 transitions. [2022-11-03 02:28:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:28:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:02,805 INFO L225 Difference]: With dead ends: 234 [2022-11-03 02:28:02,805 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 02:28:02,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:28:02,807 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 81 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:02,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 398 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-11-03 02:28:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 02:28:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-03 02:28:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.4345238095238095) internal successors, (241), 168 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 241 transitions. [2022-11-03 02:28:02,814 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 241 transitions. Word has length 68 [2022-11-03 02:28:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:02,815 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 241 transitions. [2022-11-03 02:28:02,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,815 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 241 transitions. [2022-11-03 02:28:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:02,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:02,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:02,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:03,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:03,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1286066849, now seen corresponding path program 1 times [2022-11-03 02:28:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651247647] [2022-11-03 02:28:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:03,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:03,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:03,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:03,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:28:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:03,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:03,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:04,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:04,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:04,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651247647] [2022-11-03 02:28:04,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651247647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:04,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [410814413] [2022-11-03 02:28:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:28:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:28:04,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:28:04,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 02:28:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:06,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [410814413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:06,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517039634] [2022-11-03 02:28:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:06,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:06,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:28:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:07,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:07,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517039634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:07,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:28:07,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:28:07,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614238572] [2022-11-03 02:28:07,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:28:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:28:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:28:07,347 INFO L87 Difference]: Start difference. First operand 169 states and 241 transitions. Second operand has 16 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:07,467 INFO L93 Difference]: Finished difference Result 396 states and 569 transitions. [2022-11-03 02:28:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:28:07,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:07,470 INFO L225 Difference]: With dead ends: 396 [2022-11-03 02:28:07,470 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 02:28:07,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 384 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:28:07,471 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 292 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:07,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 1440 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 60 Unchecked, 0.0s Time] [2022-11-03 02:28:07,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 02:28:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 274. [2022-11-03 02:28:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.435897435897436) internal successors, (392), 273 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 392 transitions. [2022-11-03 02:28:07,480 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 392 transitions. Word has length 68 [2022-11-03 02:28:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:07,481 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 392 transitions. [2022-11-03 02:28:07,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 392 transitions. [2022-11-03 02:28:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:07,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:07,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:07,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-03 02:28:07,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:07,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:08,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:08,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:08,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1228808547, now seen corresponding path program 1 times [2022-11-03 02:28:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:08,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899554624] [2022-11-03 02:28:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:08,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:08,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:08,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:08,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:28:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:09,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:09,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899554624] [2022-11-03 02:28:09,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899554624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:09,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688379151] [2022-11-03 02:28:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:09,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:28:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:28:09,628 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:28:09,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 02:28:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:10,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:10,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:11,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688379151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:11,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125734489] [2022-11-03 02:28:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:11,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:11,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:11,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:11,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:28:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:28:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:12,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:12,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125734489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:12,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:28:12,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:28:12,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873911947] [2022-11-03 02:28:12,297 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:12,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:28:12,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:12,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:28:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:28:12,301 INFO L87 Difference]: Start difference. First operand 274 states and 392 transitions. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:12,600 INFO L93 Difference]: Finished difference Result 529 states and 763 transitions. [2022-11-03 02:28:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:28:12,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:12,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:12,606 INFO L225 Difference]: With dead ends: 529 [2022-11-03 02:28:12,606 INFO L226 Difference]: Without dead ends: 464 [2022-11-03 02:28:12,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:28:12,607 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 188 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:12,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 826 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 02:28:12,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-03 02:28:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-11-03 02:28:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.4406047516198703) internal successors, (667), 463 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 667 transitions. [2022-11-03 02:28:12,636 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 667 transitions. Word has length 68 [2022-11-03 02:28:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:12,637 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 667 transitions. [2022-11-03 02:28:12,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 667 transitions. [2022-11-03 02:28:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:12,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:12,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:12,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:12,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:13,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:28:13,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -335322209, now seen corresponding path program 1 times [2022-11-03 02:28:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354514850] [2022-11-03 02:28:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:13,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:13,255 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:13,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:28:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:13,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:28:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:16,416 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354514850] [2022-11-03 02:28:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354514850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348184047] [2022-11-03 02:28:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:16,417 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:28:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:28:16,421 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:28:16,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:28:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:28:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:18,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:30,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [348184047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:30,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353134158] [2022-11-03 02:28:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:30,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:30,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:30,646 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:28:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:28:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:32,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:34,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353134158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:34,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:28:34,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:28:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655745865] [2022-11-03 02:28:34,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:34,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:28:34,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:28:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1371, Unknown=1, NotChecked=0, Total=1560 [2022-11-03 02:28:34,916 INFO L87 Difference]: Start difference. First operand 464 states and 667 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:36,991 INFO L93 Difference]: Finished difference Result 619 states and 886 transitions. [2022-11-03 02:28:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:28:36,992 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:36,995 INFO L225 Difference]: With dead ends: 619 [2022-11-03 02:28:36,995 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 02:28:36,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=441, Invalid=2638, Unknown=1, NotChecked=0, Total=3080 [2022-11-03 02:28:36,997 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 301 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:36,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1437 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 60 Unchecked, 0.0s Time] [2022-11-03 02:28:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 02:28:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 608. [2022-11-03 02:28:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.4382207578253707) internal successors, (873), 607 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 873 transitions. [2022-11-03 02:28:37,018 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 873 transitions. Word has length 68 [2022-11-03 02:28:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:37,019 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 873 transitions. [2022-11-03 02:28:37,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 873 transitions. [2022-11-03 02:28:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:37,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:37,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:37,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:37,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:37,628 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2024265951, now seen corresponding path program 1 times [2022-11-03 02:28:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:28:37,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811877539] [2022-11-03 02:28:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:37,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:28:37,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:28:37,631 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:28:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:28:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:38,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:28:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:39,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:41,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:28:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811877539] [2022-11-03 02:28:41,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811877539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:41,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052445734] [2022-11-03 02:28:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:41,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:28:41,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:28:41,197 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:28:41,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:28:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:28:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:43,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1052445734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189562583] [2022-11-03 02:28:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:53,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:53,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:53,885 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:53,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:28:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:28:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:55,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:28:57,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189562583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:57,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:28:57,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 38 [2022-11-03 02:28:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997452108] [2022-11-03 02:28:57,621 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:57,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:28:57,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:28:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:28:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1272, Unknown=4, NotChecked=0, Total=1406 [2022-11-03 02:28:57,623 INFO L87 Difference]: Start difference. First operand 608 states and 873 transitions. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:59,558 INFO L93 Difference]: Finished difference Result 859 states and 1226 transitions. [2022-11-03 02:28:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:28:59,559 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:28:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:59,562 INFO L225 Difference]: With dead ends: 859 [2022-11-03 02:28:59,562 INFO L226 Difference]: Without dead ends: 857 [2022-11-03 02:28:59,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=374, Invalid=2814, Unknown=4, NotChecked=0, Total=3192 [2022-11-03 02:28:59,565 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 779 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2913 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:59,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 2913 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 159 Unchecked, 0.1s Time] [2022-11-03 02:28:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-03 02:28:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 763. [2022-11-03 02:28:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.437007874015748) internal successors, (1095), 762 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:59,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1095 transitions. [2022-11-03 02:28:59,594 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1095 transitions. Word has length 68 [2022-11-03 02:28:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:59,595 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 1095 transitions. [2022-11-03 02:28:59,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:59,595 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1095 transitions. [2022-11-03 02:28:59,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:28:59,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:59,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:59,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:00,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:00,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2140760543, now seen corresponding path program 1 times [2022-11-03 02:29:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073032055] [2022-11-03 02:29:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:00,216 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:00,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:29:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:29:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:01,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:03,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073032055] [2022-11-03 02:29:03,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073032055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864782081] [2022-11-03 02:29:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:03,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:29:03,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:29:03,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:29:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:29:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:29:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:05,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:21,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1864782081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174499232] [2022-11-03 02:29:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:21,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:21,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:21,628 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:21,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:29:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:29:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:24,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:29,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174499232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:29,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:29:29,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:29:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626715843] [2022-11-03 02:29:29,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:29:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:29:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:29:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1368, Unknown=4, NotChecked=0, Total=1560 [2022-11-03 02:29:29,591 INFO L87 Difference]: Start difference. First operand 763 states and 1095 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:33,074 INFO L93 Difference]: Finished difference Result 1037 states and 1482 transitions. [2022-11-03 02:29:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:29:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:29:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:33,078 INFO L225 Difference]: With dead ends: 1037 [2022-11-03 02:29:33,078 INFO L226 Difference]: Without dead ends: 1035 [2022-11-03 02:29:33,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=441, Invalid=2635, Unknown=4, NotChecked=0, Total=3080 [2022-11-03 02:29:33,080 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 383 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:33,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1500 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-03 02:29:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-03 02:29:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1014. [2022-11-03 02:29:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.435340572556762) internal successors, (1454), 1013 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1454 transitions. [2022-11-03 02:29:33,123 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1454 transitions. Word has length 68 [2022-11-03 02:29:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:33,123 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 1454 transitions. [2022-11-03 02:29:33,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1454 transitions. [2022-11-03 02:29:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:29:33,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:33,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:33,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:33,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:33,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:33,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:29:33,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash 465263011, now seen corresponding path program 1 times [2022-11-03 02:29:33,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:29:33,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205189942] [2022-11-03 02:29:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:33,743 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:29:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:29:33,743 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:29:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:29:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:29:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:36,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:29:39,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:29:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205189942] [2022-11-03 02:29:39,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205189942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:39,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [625348252] [2022-11-03 02:29:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:39,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:29:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:29:39,651 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:29:39,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:29:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:29:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:43,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:29:57,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [625348252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808420092] [2022-11-03 02:29:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:57,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:57,436 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:57,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:29:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:57,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:29:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:06,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808420092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:06,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:06,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:30:06,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546134253] [2022-11-03 02:30:06,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:06,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:30:06,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:30:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1421, Unknown=4, NotChecked=0, Total=1560 [2022-11-03 02:30:06,055 INFO L87 Difference]: Start difference. First operand 1014 states and 1454 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:12,032 INFO L93 Difference]: Finished difference Result 2046 states and 2928 transitions. [2022-11-03 02:30:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:30:12,033 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:30:12,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:12,038 INFO L225 Difference]: With dead ends: 2046 [2022-11-03 02:30:12,038 INFO L226 Difference]: Without dead ends: 2044 [2022-11-03 02:30:12,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=397, Invalid=3259, Unknown=4, NotChecked=0, Total=3660 [2022-11-03 02:30:12,040 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 683 mSDsluCounter, 2739 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:12,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 2858 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 217 Unchecked, 0.2s Time] [2022-11-03 02:30:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2022-11-03 02:30:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1139. [2022-11-03 02:30:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.4349736379613356) internal successors, (1633), 1138 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1633 transitions. [2022-11-03 02:30:12,102 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1633 transitions. Word has length 68 [2022-11-03 02:30:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:12,102 INFO L495 AbstractCegarLoop]: Abstraction has 1139 states and 1633 transitions. [2022-11-03 02:30:12,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1633 transitions. [2022-11-03 02:30:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:30:12,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:12,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:12,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:12,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:12,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:12,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:12,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2019854169, now seen corresponding path program 1 times [2022-11-03 02:30:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275638982] [2022-11-03 02:30:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:12,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:12,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:12,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:30:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:30:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:15,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:18,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275638982] [2022-11-03 02:30:18,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275638982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:18,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713358146] [2022-11-03 02:30:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:18,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:18,713 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:18,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:30:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:19,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:30:19,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:22,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:36,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1713358146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:36,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591193526] [2022-11-03 02:30:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:36,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:36,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:36,099 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:36,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:30:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:30:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:39,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591193526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:44,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:30:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957161802] [2022-11-03 02:30:44,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:30:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:44,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:30:44,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1421, Unknown=4, NotChecked=0, Total=1560 [2022-11-03 02:30:44,659 INFO L87 Difference]: Start difference. First operand 1139 states and 1633 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:49,661 INFO L93 Difference]: Finished difference Result 2461 states and 3518 transitions. [2022-11-03 02:30:49,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:30:49,662 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:30:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:49,668 INFO L225 Difference]: With dead ends: 2461 [2022-11-03 02:30:49,669 INFO L226 Difference]: Without dead ends: 2459 [2022-11-03 02:30:49,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=388, Invalid=3148, Unknown=4, NotChecked=0, Total=3540 [2022-11-03 02:30:49,671 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 548 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:49,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 2578 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-11-03 02:30:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-11-03 02:30:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1655. [2022-11-03 02:30:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 1.4389359129383312) internal successors, (2380), 1654 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2380 transitions. [2022-11-03 02:30:49,759 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2380 transitions. Word has length 68 [2022-11-03 02:30:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:49,760 INFO L495 AbstractCegarLoop]: Abstraction has 1655 states and 2380 transitions. [2022-11-03 02:30:49,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:49,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2380 transitions. [2022-11-03 02:30:49,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:30:49,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:49,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:49,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:49,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-03 02:30:50,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:50,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:50,381 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:50,382 INFO L85 PathProgramCache]: Analyzing trace with hash -758936919, now seen corresponding path program 1 times [2022-11-03 02:30:50,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:50,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176887881] [2022-11-03 02:30:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:50,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:50,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:50,383 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:30:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:51,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:51,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176887881] [2022-11-03 02:30:51,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176887881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:51,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:51,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:30:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574773650] [2022-11-03 02:30:51,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:30:51,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:30:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:51,104 INFO L87 Difference]: Start difference. First operand 1655 states and 2380 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:51,516 INFO L93 Difference]: Finished difference Result 4380 states and 6287 transitions. [2022-11-03 02:30:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:30:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:30:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:51,524 INFO L225 Difference]: With dead ends: 4380 [2022-11-03 02:30:51,524 INFO L226 Difference]: Without dead ends: 3267 [2022-11-03 02:30:51,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:51,526 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 215 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:51,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 754 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-11-03 02:30:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-11-03 02:30:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1655. [2022-11-03 02:30:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 1.4365175332527207) internal successors, (2376), 1654 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2376 transitions. [2022-11-03 02:30:51,617 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2376 transitions. Word has length 68 [2022-11-03 02:30:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:51,617 INFO L495 AbstractCegarLoop]: Abstraction has 1655 states and 2376 transitions. [2022-11-03 02:30:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2376 transitions. [2022-11-03 02:30:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:30:51,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:51,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:51,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:51,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1507444267, now seen corresponding path program 1 times [2022-11-03 02:30:51,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:51,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638151684] [2022-11-03 02:30:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:51,832 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:30:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:52,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:52,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:52,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638151684] [2022-11-03 02:30:52,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638151684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:52,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:52,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:30:52,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823805337] [2022-11-03 02:30:52,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:52,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:30:52,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:52,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:30:52,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:52,627 INFO L87 Difference]: Start difference. First operand 1655 states and 2376 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:53,061 INFO L93 Difference]: Finished difference Result 4012 states and 5739 transitions. [2022-11-03 02:30:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:30:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:30:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:53,071 INFO L225 Difference]: With dead ends: 4012 [2022-11-03 02:30:53,071 INFO L226 Difference]: Without dead ends: 3027 [2022-11-03 02:30:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:30:53,073 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 125 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:53,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 828 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 02:30:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-11-03 02:30:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 1687. [2022-11-03 02:30:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4282325029655991) internal successors, (2408), 1686 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2408 transitions. [2022-11-03 02:30:53,162 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2408 transitions. Word has length 68 [2022-11-03 02:30:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:53,162 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2408 transitions. [2022-11-03 02:30:53,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2408 transitions. [2022-11-03 02:30:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:30:53,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:53,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:53,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:53,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:53,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2127991507, now seen corresponding path program 1 times [2022-11-03 02:30:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:53,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618088067] [2022-11-03 02:30:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:53,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:53,385 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:30:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:30:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:55,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:30:59,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:59,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618088067] [2022-11-03 02:30:59,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618088067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:59,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768843735] [2022-11-03 02:30:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:59,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:59,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:59,389 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:59,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 02:31:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:31:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768843735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829175579] [2022-11-03 02:31:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:13,122 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:13,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 02:31:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:13,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:31:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:16,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:21,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829175579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:21,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:21,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:31:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238995905] [2022-11-03 02:31:21,726 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:31:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:31:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1423, Unknown=2, NotChecked=0, Total=1560 [2022-11-03 02:31:21,728 INFO L87 Difference]: Start difference. First operand 1687 states and 2408 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:27,011 INFO L93 Difference]: Finished difference Result 3320 states and 4724 transitions. [2022-11-03 02:31:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:31:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:31:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:27,016 INFO L225 Difference]: With dead ends: 3320 [2022-11-03 02:31:27,016 INFO L226 Difference]: Without dead ends: 3318 [2022-11-03 02:31:27,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=388, Invalid=3150, Unknown=2, NotChecked=0, Total=3540 [2022-11-03 02:31:27,018 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 658 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:27,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 2999 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-11-03 02:31:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-11-03 02:31:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 1783. [2022-11-03 02:31:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.4276094276094276) internal successors, (2544), 1782 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2544 transitions. [2022-11-03 02:31:27,120 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2544 transitions. Word has length 68 [2022-11-03 02:31:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:27,121 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2544 transitions. [2022-11-03 02:31:27,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2544 transitions. [2022-11-03 02:31:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:31:27,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:27,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:27,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:27,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:27,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:27,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:27,737 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 321608623, now seen corresponding path program 1 times [2022-11-03 02:31:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:27,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555485249] [2022-11-03 02:31:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:27,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:27,740 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:27,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:31:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:28,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:31:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:30,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:33,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555485249] [2022-11-03 02:31:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555485249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:33,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580784793] [2022-11-03 02:31:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:33,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:31:33,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:31:33,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:31:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 02:31:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:36,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1580784793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860184921] [2022-11-03 02:31:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:45,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:45,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:45,663 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:31:45,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:31:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:46,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:31:46,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:48,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:31:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:31:53,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860184921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:31:53,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:31:53,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 38 [2022-11-03 02:31:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421612538] [2022-11-03 02:31:53,492 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:31:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:31:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1274, Unknown=2, NotChecked=0, Total=1406 [2022-11-03 02:31:53,494 INFO L87 Difference]: Start difference. First operand 1783 states and 2544 transitions. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:57,935 INFO L93 Difference]: Finished difference Result 3608 states and 5160 transitions. [2022-11-03 02:31:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:31:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:31:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:57,941 INFO L225 Difference]: With dead ends: 3608 [2022-11-03 02:31:57,941 INFO L226 Difference]: Without dead ends: 3606 [2022-11-03 02:31:57,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=383, Invalid=2921, Unknown=2, NotChecked=0, Total=3306 [2022-11-03 02:31:57,943 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 641 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:57,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 2761 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 204 Unchecked, 0.2s Time] [2022-11-03 02:31:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2022-11-03 02:31:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 1783. [2022-11-03 02:31:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.4276094276094276) internal successors, (2544), 1782 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2544 transitions. [2022-11-03 02:31:58,072 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2544 transitions. Word has length 68 [2022-11-03 02:31:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:58,072 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2544 transitions. [2022-11-03 02:31:58,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2544 transitions. [2022-11-03 02:31:58,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:31:58,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:58,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:31:58,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 02:31:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:58,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:58,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:31:58,693 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -522396879, now seen corresponding path program 1 times [2022-11-03 02:31:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:58,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35475484] [2022-11-03 02:31:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:58,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:58,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:58,695 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:31:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:31:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:01,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:04,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35475484] [2022-11-03 02:32:04,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35475484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1712879864] [2022-11-03 02:32:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:04,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:04,644 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:04,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:32:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:32:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:08,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:17,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1712879864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366287095] [2022-11-03 02:32:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:17,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:17,758 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:17,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:32:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:32:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:20,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366287095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:25,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:25,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 38 [2022-11-03 02:32:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084511192] [2022-11-03 02:32:25,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:32:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:32:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1273, Unknown=3, NotChecked=0, Total=1406 [2022-11-03 02:32:25,581 INFO L87 Difference]: Start difference. First operand 1783 states and 2544 transitions. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:32:29,607 INFO L93 Difference]: Finished difference Result 2361 states and 3374 transitions. [2022-11-03 02:32:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:32:29,613 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:32:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:32:29,619 INFO L225 Difference]: With dead ends: 2361 [2022-11-03 02:32:29,619 INFO L226 Difference]: Without dead ends: 2359 [2022-11-03 02:32:29,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=374, Invalid=2815, Unknown=3, NotChecked=0, Total=3192 [2022-11-03 02:32:29,620 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 482 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:32:29,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 2636 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 180 Unchecked, 0.1s Time] [2022-11-03 02:32:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2022-11-03 02:32:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1503. [2022-11-03 02:32:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 1.430093209054594) internal successors, (2148), 1502 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 2148 transitions. [2022-11-03 02:32:29,733 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 2148 transitions. Word has length 68 [2022-11-03 02:32:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:32:29,733 INFO L495 AbstractCegarLoop]: Abstraction has 1503 states and 2148 transitions. [2022-11-03 02:32:29,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:32:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 2148 transitions. [2022-11-03 02:32:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:32:29,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:32:29,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:32:29,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:29,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 02:32:30,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:32:30,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:32:30,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:32:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:32:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1488600655, now seen corresponding path program 1 times [2022-11-03 02:32:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:32:30,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119859318] [2022-11-03 02:32:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:30,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:32:30,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:32:30,356 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:32:30,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:32:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:30,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:32:30,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:32,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:36,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:36,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119859318] [2022-11-03 02:32:36,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119859318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:36,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672547899] [2022-11-03 02:32:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:36,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:36,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:36,125 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:36,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:32:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:36,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:32:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:39,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:49,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672547899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789500407] [2022-11-03 02:32:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:32:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:32:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:32:49,087 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:32:49,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:32:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:32:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:32:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:32:56,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789500407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:56,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:32:56,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 38 [2022-11-03 02:32:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286077075] [2022-11-03 02:32:56,956 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:32:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:32:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:32:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:32:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1255, Unknown=3, NotChecked=0, Total=1406 [2022-11-03 02:32:56,958 INFO L87 Difference]: Start difference. First operand 1503 states and 2148 transitions. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:01,686 INFO L93 Difference]: Finished difference Result 2599 states and 3700 transitions. [2022-11-03 02:33:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:33:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:33:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:01,694 INFO L225 Difference]: With dead ends: 2599 [2022-11-03 02:33:01,694 INFO L226 Difference]: Without dead ends: 2597 [2022-11-03 02:33:01,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=375, Invalid=2702, Unknown=3, NotChecked=0, Total=3080 [2022-11-03 02:33:01,696 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 516 mSDsluCounter, 2718 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:01,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 2862 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-11-03 02:33:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-11-03 02:33:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2447. [2022-11-03 02:33:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 1.4325429272281276) internal successors, (3504), 2446 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 3504 transitions. [2022-11-03 02:33:01,862 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 3504 transitions. Word has length 68 [2022-11-03 02:33:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:01,862 INFO L495 AbstractCegarLoop]: Abstraction has 2447 states and 3504 transitions. [2022-11-03 02:33:01,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 3504 transitions. [2022-11-03 02:33:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:33:01,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:01,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:01,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:02,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:02,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:02,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:02,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1348052045, now seen corresponding path program 1 times [2022-11-03 02:33:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263044588] [2022-11-03 02:33:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:02,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:02,486 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:02,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:33:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:02,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:03,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:03,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263044588] [2022-11-03 02:33:03,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263044588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:03,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:03,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391649036] [2022-11-03 02:33:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:03,450 INFO L87 Difference]: Start difference. First operand 2447 states and 3504 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:03,861 INFO L93 Difference]: Finished difference Result 3475 states and 4956 transitions. [2022-11-03 02:33:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:33:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:33:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:03,866 INFO L225 Difference]: With dead ends: 3475 [2022-11-03 02:33:03,867 INFO L226 Difference]: Without dead ends: 2822 [2022-11-03 02:33:03,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:03,868 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 64 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:03,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 579 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-03 02:33:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-11-03 02:33:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2469. [2022-11-03 02:33:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 1.423419773095624) internal successors, (3513), 2468 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3513 transitions. [2022-11-03 02:33:03,986 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3513 transitions. Word has length 68 [2022-11-03 02:33:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:03,987 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3513 transitions. [2022-11-03 02:33:03,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3513 transitions. [2022-11-03 02:33:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:33:03,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:03,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:04,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:04,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:04,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1934858059, now seen corresponding path program 1 times [2022-11-03 02:33:04,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681879485] [2022-11-03 02:33:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:04,208 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:04,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:33:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:33:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:06,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:10,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681879485] [2022-11-03 02:33:10,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681879485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052098454] [2022-11-03 02:33:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:10,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:10,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:10,047 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:10,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:33:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:33:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:13,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:22,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1052098454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:22,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452288413] [2022-11-03 02:33:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:22,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:22,870 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:22,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 02:33:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:23,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:33:23,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:30,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452288413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:30,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:30,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 9, 9] total 38 [2022-11-03 02:33:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738684304] [2022-11-03 02:33:30,770 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:30,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:33:30,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:33:30,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1255, Unknown=3, NotChecked=0, Total=1406 [2022-11-03 02:33:30,772 INFO L87 Difference]: Start difference. First operand 2469 states and 3513 transitions. Second operand has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:33,848 INFO L93 Difference]: Finished difference Result 5099 states and 7230 transitions. [2022-11-03 02:33:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:33:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:33:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:33,855 INFO L225 Difference]: With dead ends: 5099 [2022-11-03 02:33:33,855 INFO L226 Difference]: Without dead ends: 5097 [2022-11-03 02:33:33,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=349, Invalid=2510, Unknown=3, NotChecked=0, Total=2862 [2022-11-03 02:33:33,858 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 399 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:33,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 2275 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-11-03 02:33:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2022-11-03 02:33:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 3253. [2022-11-03 02:33:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3253 states, 3252 states have (on average 1.419741697416974) internal successors, (4617), 3252 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3253 states to 3253 states and 4617 transitions. [2022-11-03 02:33:34,008 INFO L78 Accepts]: Start accepts. Automaton has 3253 states and 4617 transitions. Word has length 68 [2022-11-03 02:33:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:34,009 INFO L495 AbstractCegarLoop]: Abstraction has 3253 states and 4617 transitions. [2022-11-03 02:33:34,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.368421052631579) internal successors, (394), 38 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3253 states and 4617 transitions. [2022-11-03 02:33:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:33:34,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:34,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:34,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:34,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:34,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:33:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:34,621 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:34,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:34,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1844045767, now seen corresponding path program 1 times [2022-11-03 02:33:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706738494] [2022-11-03 02:33:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:34,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:34,623 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:34,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:33:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:33:35,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:35,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:33:35,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706738494] [2022-11-03 02:33:35,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706738494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:33:35,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:33:35,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:33:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483703531] [2022-11-03 02:33:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:33:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:33:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:33:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:33:35,521 INFO L87 Difference]: Start difference. First operand 3253 states and 4617 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:33:35,952 INFO L93 Difference]: Finished difference Result 6229 states and 8791 transitions. [2022-11-03 02:33:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:33:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:33:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:33:35,959 INFO L225 Difference]: With dead ends: 6229 [2022-11-03 02:33:35,959 INFO L226 Difference]: Without dead ends: 4488 [2022-11-03 02:33:35,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:33:35,962 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 120 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:33:35,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 632 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-11-03 02:33:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2022-11-03 02:33:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 3333. [2022-11-03 02:33:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.4072629051620649) internal successors, (4689), 3332 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4689 transitions. [2022-11-03 02:33:36,090 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4689 transitions. Word has length 68 [2022-11-03 02:33:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:33:36,091 INFO L495 AbstractCegarLoop]: Abstraction has 3333 states and 4689 transitions. [2022-11-03 02:33:36,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:33:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4689 transitions. [2022-11-03 02:33:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:33:36,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:33:36,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:33:36,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 02:33:36,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:33:36,309 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:33:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:33:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1421343941, now seen corresponding path program 1 times [2022-11-03 02:33:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:33:36,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221883438] [2022-11-03 02:33:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:36,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:33:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:33:36,311 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:33:36,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:33:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:33:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:38,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:33:42,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:42,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221883438] [2022-11-03 02:33:42,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221883438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:42,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [273073587] [2022-11-03 02:33:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:42,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:42,459 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:42,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:33:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:33:43,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:46,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:33:58,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [273073587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:58,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670989178] [2022-11-03 02:33:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:58,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:58,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:58,834 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:58,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:33:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:33:59,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:02,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:06,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670989178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:06,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:34:06,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:34:06,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263387489] [2022-11-03 02:34:06,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:34:06,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:34:06,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:06,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:34:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1352, Unknown=2, NotChecked=0, Total=1560 [2022-11-03 02:34:07,000 INFO L87 Difference]: Start difference. First operand 3333 states and 4689 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:11,873 INFO L93 Difference]: Finished difference Result 6578 states and 9265 transitions. [2022-11-03 02:34:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:34:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:34:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:11,888 INFO L225 Difference]: With dead ends: 6578 [2022-11-03 02:34:11,888 INFO L226 Difference]: Without dead ends: 6576 [2022-11-03 02:34:11,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=477, Invalid=2827, Unknown=2, NotChecked=0, Total=3306 [2022-11-03 02:34:11,896 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 850 mSDsluCounter, 1878 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:11,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1954 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-11-03 02:34:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2022-11-03 02:34:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 6339. [2022-11-03 02:34:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 1.4103818239192174) internal successors, (8939), 6338 states have internal predecessors, (8939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 8939 transitions. [2022-11-03 02:34:12,266 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 8939 transitions. Word has length 68 [2022-11-03 02:34:12,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:12,267 INFO L495 AbstractCegarLoop]: Abstraction has 6339 states and 8939 transitions. [2022-11-03 02:34:12,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 8939 transitions. [2022-11-03 02:34:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:34:12,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:12,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:12,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:12,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:12,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:12,873 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:12,873 INFO L85 PathProgramCache]: Analyzing trace with hash 374521533, now seen corresponding path program 1 times [2022-11-03 02:34:12,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450723990] [2022-11-03 02:34:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:12,876 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:12,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:34:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:13,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:13,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:13,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:13,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450723990] [2022-11-03 02:34:13,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450723990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:13,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:13,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619697692] [2022-11-03 02:34:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:13,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:13,738 INFO L87 Difference]: Start difference. First operand 6339 states and 8939 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:14,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:14,436 INFO L93 Difference]: Finished difference Result 10433 states and 14558 transitions. [2022-11-03 02:34:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:14,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:34:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:14,449 INFO L225 Difference]: With dead ends: 10433 [2022-11-03 02:34:14,449 INFO L226 Difference]: Without dead ends: 9284 [2022-11-03 02:34:14,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:34:14,453 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 153 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 668 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-11-03 02:34:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9284 states. [2022-11-03 02:34:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9284 to 6339. [2022-11-03 02:34:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 1.40785736825497) internal successors, (8923), 6338 states have internal predecessors, (8923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 8923 transitions. [2022-11-03 02:34:14,879 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 8923 transitions. Word has length 68 [2022-11-03 02:34:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:14,880 INFO L495 AbstractCegarLoop]: Abstraction has 6339 states and 8923 transitions. [2022-11-03 02:34:14,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 8923 transitions. [2022-11-03 02:34:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:34:14,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:14,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:14,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:15,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:15,102 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1997217729, now seen corresponding path program 1 times [2022-11-03 02:34:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:15,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213587460] [2022-11-03 02:34:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:15,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:15,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:15,104 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:15,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:34:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:34:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:17,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:20,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213587460] [2022-11-03 02:34:20,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213587460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415845635] [2022-11-03 02:34:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:20,970 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:34:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:21,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:34:21,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:25,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:34:37,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415845635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:37,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463748741] [2022-11-03 02:34:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:37,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:37,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:37,181 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:34:37,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 02:34:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:34:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:40,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:45,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463748741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:45,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:34:45,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 10, 9, 9] total 40 [2022-11-03 02:34:45,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292441171] [2022-11-03 02:34:45,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:34:45,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:34:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:34:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1351, Unknown=3, NotChecked=0, Total=1560 [2022-11-03 02:34:45,503 INFO L87 Difference]: Start difference. First operand 6339 states and 8923 transitions. Second operand has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:50,671 INFO L93 Difference]: Finished difference Result 8968 states and 12660 transitions. [2022-11-03 02:34:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:34:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:34:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:50,682 INFO L225 Difference]: With dead ends: 8968 [2022-11-03 02:34:50,682 INFO L226 Difference]: Without dead ends: 8966 [2022-11-03 02:34:50,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=488, Invalid=2815, Unknown=3, NotChecked=0, Total=3306 [2022-11-03 02:34:50,684 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 605 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:50,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1654 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 138 Unchecked, 0.1s Time] [2022-11-03 02:34:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8966 states. [2022-11-03 02:34:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8966 to 8661. [2022-11-03 02:34:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 8660 states have (on average 1.4136258660508083) internal successors, (12242), 8660 states have internal predecessors, (12242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 12242 transitions. [2022-11-03 02:34:51,134 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 12242 transitions. Word has length 68 [2022-11-03 02:34:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:51,134 INFO L495 AbstractCegarLoop]: Abstraction has 8661 states and 12242 transitions. [2022-11-03 02:34:51,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 9.85) internal successors, (394), 40 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 12242 transitions. [2022-11-03 02:34:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:34:51,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:51,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:51,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:51,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:51,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:34:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:51,769 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 608805825, now seen corresponding path program 1 times [2022-11-03 02:34:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:51,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648438417] [2022-11-03 02:34:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:51,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:51,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:51,771 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:51,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:34:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:52,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:34:52,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:54,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:34:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:57,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:57,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648438417] [2022-11-03 02:34:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648438417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:34:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850177319] [2022-11-03 02:34:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:34:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:34:57,733 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:34:57,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 02:34:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 02:34:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:00,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850177319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819998452] [2022-11-03 02:35:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:07,264 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:07,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 02:35:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:35:07,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:35:09,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:35:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819998452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:14,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:35:14,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 36 [2022-11-03 02:35:14,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577092122] [2022-11-03 02:35:14,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:14,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:35:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:35:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1116, Unknown=1, NotChecked=0, Total=1260 [2022-11-03 02:35:14,870 INFO L87 Difference]: Start difference. First operand 8661 states and 12242 transitions. Second operand has 36 states, 36 states have (on average 10.944444444444445) internal successors, (394), 36 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:17,723 INFO L93 Difference]: Finished difference Result 13379 states and 19111 transitions. [2022-11-03 02:35:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:35:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 10.944444444444445) internal successors, (394), 36 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-03 02:35:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:17,732 INFO L225 Difference]: With dead ends: 13379 [2022-11-03 02:35:17,732 INFO L226 Difference]: Without dead ends: 13377 [2022-11-03 02:35:17,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=335, Invalid=2214, Unknown=1, NotChecked=0, Total=2550 [2022-11-03 02:35:17,735 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 405 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:17,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2249 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-11-03 02:35:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13377 states. [2022-11-03 02:35:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13377 to 8171. [2022-11-03 02:35:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.4209302325581394) internal successors, (11609), 8170 states have internal predecessors, (11609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 11609 transitions. [2022-11-03 02:35:18,128 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 11609 transitions. Word has length 68 [2022-11-03 02:35:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:18,128 INFO L495 AbstractCegarLoop]: Abstraction has 8171 states and 11609 transitions. [2022-11-03 02:35:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.944444444444445) internal successors, (394), 36 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 11609 transitions. [2022-11-03 02:35:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:35:18,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:18,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:18,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:18,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:18,749 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1502232581, now seen corresponding path program 1 times [2022-11-03 02:35:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:18,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446733771] [2022-11-03 02:35:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:18,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:18,751 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:18,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:35:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:35:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:37:49,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:08,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446733771] [2022-11-03 02:38:08,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446733771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1499766885] [2022-11-03 02:38:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:08,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:08,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:08,776 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:08,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 02:38:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:38:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:52,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1499766885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446447500] [2022-11-03 02:38:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:52,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:52,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:52,700 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:52,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 02:38:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:38:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:00,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:54,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446447500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:54,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:54,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 9, 10] total 40 [2022-11-03 02:39:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580149967] [2022-11-03 02:39:54,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:54,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:39:54,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:39:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1324, Unknown=51, NotChecked=0, Total=1560 [2022-11-03 02:39:54,148 INFO L87 Difference]: Start difference. First operand 8171 states and 11609 transitions. Second operand has 40 states, 40 states have (on average 7.875) internal successors, (315), 40 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:02,721 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:40:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:40:02,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 364 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 265.5s TimeCoverageRelationStatistics Valid=311, Invalid=1894, Unknown=51, NotChecked=0, Total=2256 [2022-11-03 02:40:02,723 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 501 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:02,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 2569 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 192 Unchecked, 0.0s Time] [2022-11-03 02:40:02,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:40:02,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:02,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:03,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:03,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:03,324 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:894) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 49 more [2022-11-03 02:40:03,327 INFO L158 Benchmark]: Toolchain (without parser) took 729459.75ms. Allocated memory was 71.3MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 47.3MB in the beginning and 919.1MB in the end (delta: -871.8MB). Peak memory consumption was 251.5MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,327 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 52.4MB. Free memory was 32.7MB in the beginning and 32.7MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:40:03,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.01ms. Allocated memory is still 71.3MB. Free memory was 47.1MB in the beginning and 47.5MB in the end (delta: -393.8kB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,328 INFO L158 Benchmark]: Boogie Procedure Inliner took 153.11ms. Allocated memory is still 71.3MB. Free memory was 47.5MB in the beginning and 39.2MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,328 INFO L158 Benchmark]: Boogie Preprocessor took 100.30ms. Allocated memory is still 71.3MB. Free memory was 39.2MB in the beginning and 33.6MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,328 INFO L158 Benchmark]: RCFGBuilder took 1540.89ms. Allocated memory was 71.3MB in the beginning and 119.5MB in the end (delta: 48.2MB). Free memory was 33.6MB in the beginning and 69.1MB in the end (delta: -35.5MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,329 INFO L158 Benchmark]: TraceAbstraction took 726948.38ms. Allocated memory was 119.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 68.3MB in the beginning and 919.1MB in the end (delta: -850.8MB). Peak memory consumption was 223.3MB. Max. memory is 16.1GB. [2022-11-03 02:40:03,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 52.4MB. Free memory was 32.7MB in the beginning and 32.7MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.01ms. Allocated memory is still 71.3MB. Free memory was 47.1MB in the beginning and 47.5MB in the end (delta: -393.8kB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 153.11ms. Allocated memory is still 71.3MB. Free memory was 47.5MB in the beginning and 39.2MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 100.30ms. Allocated memory is still 71.3MB. Free memory was 39.2MB in the beginning and 33.6MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 1540.89ms. Allocated memory was 71.3MB in the beginning and 119.5MB in the end (delta: 48.2MB). Free memory was 33.6MB in the beginning and 69.1MB in the end (delta: -35.5MB). Peak memory consumption was 28.9MB. Max. memory is 16.1GB. * TraceAbstraction took 726948.38ms. Allocated memory was 119.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 68.3MB in the beginning and 919.1MB in the end (delta: -850.8MB). Peak memory consumption was 223.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c238b524-4869-407a-906f-b0c8f1e91b0b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")