./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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 a719cfd0aa0307b53bbfa04d6ae952f8595dfb767fda2449e02648cf175d9360 --- 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 04:06:52,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:06:52,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:06:52,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:06:52,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:06:52,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:06:52,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:06:52,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:06:52,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:06:52,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:06:52,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:06:52,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:06:52,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:06:52,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:06:52,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:06:52,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:06:52,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:06:52,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:06:52,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:06:52,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:06:52,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:06:52,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:06:52,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:06:52,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:06:52,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:06:52,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:06:52,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:06:52,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:06:52,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:06:52,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:06:52,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:06:52,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:06:52,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:06:52,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:06:52,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:06:52,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:06:52,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:06:52,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:06:52,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:06:52,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:06:52,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:06:52,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:06:52,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:06:52,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:06:52,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:06:52,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:06:52,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:06:52,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:06:52,248 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:06:52,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:06:52,249 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:06:52,249 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:06:52,250 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:06:52,250 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:06:52,251 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:06:52,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:06:52,251 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:06:52,251 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:06:52,251 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:06:52,252 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:06:52,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:06:52,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:06:52,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:06:52,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:06:52,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:06:52,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:06:52,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:06:52,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:06:52,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:06:52,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:06:52,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:06:52,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:52,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:06:52,257 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:06:52,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:06:52,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:06:52,258 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:06:52,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:06:52,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:06:52,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:06:52,258 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a719cfd0aa0307b53bbfa04d6ae952f8595dfb767fda2449e02648cf175d9360 [2022-11-03 04:06:52,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:06:52,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:06:52,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:06:52,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:06:52,608 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:06:52,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:06:52,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/fc648805f/b0a69fc89e264717a432f858f13a4e1b/FLAG7fbc7092b [2022-11-03 04:06:53,169 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:06:53,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:06:53,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/fc648805f/b0a69fc89e264717a432f858f13a4e1b/FLAG7fbc7092b [2022-11-03 04:06:53,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/fc648805f/b0a69fc89e264717a432f858f13a4e1b [2022-11-03 04:06:53,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:06:53,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:06:53,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:53,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:06:53,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:06:53,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:53,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e0c416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53, skipping insertion in model container [2022-11-03 04:06:53,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:53,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:06:53,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:06:53,816 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c[1107,1120] [2022-11-03 04:06:53,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:53,895 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:06:53,904 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c[1107,1120] [2022-11-03 04:06:53,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:06:53,955 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:06:53,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53 WrapperNode [2022-11-03 04:06:53,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:53,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:53,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:06:53,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:06:53,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:53,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,031 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 284 [2022-11-03 04:06:54,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:06:54,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:06:54,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:06:54,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:06:54,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:06:54,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:06:54,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:06:54,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:06:54,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (1/1) ... [2022-11-03 04:06:54,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:54,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:54,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:06:54,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:06:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:06:54,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:06:54,306 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:06:54,322 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:06:54,778 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:06:55,120 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:06:55,120 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:06:55,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:55 BoogieIcfgContainer [2022-11-03 04:06:55,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:06:55,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:06:55,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:06:55,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:06:55,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:06:53" (1/3) ... [2022-11-03 04:06:55,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d02d8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:55, skipping insertion in model container [2022-11-03 04:06:55,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:53" (2/3) ... [2022-11-03 04:06:55,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d02d8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:06:55, skipping insertion in model container [2022-11-03 04:06:55,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:55" (3/3) ... [2022-11-03 04:06:55,135 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:06:55,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:06:55,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:06:55,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:06:55,223 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;@6deb8188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:06:55,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:06:55,230 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 04:06:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:06:55,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:55,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:06:55,239 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:06:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash 4925543, now seen corresponding path program 1 times [2022-11-03 04:06:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:06:55,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419002645] [2022-11-03 04:06:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:06:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:06:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:06:55,531 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:06:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:06:55,651 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:06:55,654 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:06:55,656 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:06:55,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:06:55,663 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:06:55,667 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:06:55,682 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:06:55,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:06:55 BoogieIcfgContainer [2022-11-03 04:06:55,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:06:55,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:06:55,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:06:55,690 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:06:55,691 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:06:55" (3/4) ... [2022-11-03 04:06:55,694 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:06:55,694 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:06:55,695 INFO L158 Benchmark]: Toolchain (without parser) took 2164.55ms. Allocated memory is still 107.0MB. Free memory was 69.1MB in the beginning and 51.1MB in the end (delta: 18.0MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,696 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory is still 85.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:06:55,696 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.73ms. Allocated memory is still 107.0MB. Free memory was 68.9MB in the beginning and 79.6MB in the end (delta: -10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,697 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.54ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 75.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,698 INFO L158 Benchmark]: Boogie Preprocessor took 40.56ms. Allocated memory is still 107.0MB. Free memory was 75.8MB in the beginning and 73.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,699 INFO L158 Benchmark]: RCFGBuilder took 1050.13ms. Allocated memory is still 107.0MB. Free memory was 73.3MB in the beginning and 74.2MB in the end (delta: -827.2kB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,699 INFO L158 Benchmark]: TraceAbstraction took 561.62ms. Allocated memory is still 107.0MB. Free memory was 73.5MB in the beginning and 51.1MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-03 04:06:55,700 INFO L158 Benchmark]: Witness Printer took 4.29ms. Allocated memory is still 107.0MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:06:55,704 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 107.0MB. Free memory is still 85.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.73ms. Allocated memory is still 107.0MB. Free memory was 68.9MB in the beginning and 79.6MB in the end (delta: -10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.54ms. Allocated memory is still 107.0MB. Free memory was 79.6MB in the beginning and 75.8MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.56ms. Allocated memory is still 107.0MB. Free memory was 75.8MB in the beginning and 73.3MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1050.13ms. Allocated memory is still 107.0MB. Free memory was 73.3MB in the beginning and 74.2MB in the end (delta: -827.2kB). Peak memory consumption was 41.5MB. Max. memory is 16.1GB. * TraceAbstraction took 561.62ms. Allocated memory is still 107.0MB. Free memory was 73.5MB in the beginning and 51.1MB in the end (delta: 22.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 4.29ms. Allocated memory is still 107.0MB. Free memory is still 51.1MB. 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 95, overapproximation of bitwiseAnd at line 85. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 8); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (8 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 1); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (1 - 1); [L31] const SORT_1 var_9 = 0; [L32] const SORT_5 var_17 = 1; [L33] const SORT_5 var_29 = 0; [L34] const SORT_1 var_75 = 1; [L36] SORT_1 input_2; [L37] SORT_1 input_3; [L38] SORT_1 input_4; [L39] SORT_5 input_6; [L40] SORT_5 input_7; [L41] SORT_5 input_8; [L42] SORT_5 input_27; [L44] SORT_1 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L49] SORT_5 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L50] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L51] SORT_5 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L52] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L53] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L54] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 init_11_arg_1 = var_9; [L57] state_10 = init_11_arg_1 [L58] SORT_1 init_13_arg_1 = var_9; [L59] state_12 = init_13_arg_1 [L60] SORT_1 init_22_arg_1 = var_9; [L61] state_21 = init_22_arg_1 [L62] SORT_1 init_24_arg_1 = var_9; [L63] state_23 = init_24_arg_1 [L64] SORT_1 init_26_arg_1 = var_9; [L65] state_25 = init_26_arg_1 [L66] SORT_5 init_31_arg_1 = var_29; [L67] state_30 = init_31_arg_1 [L68] SORT_1 init_33_arg_1 = var_9; [L69] state_32 = init_33_arg_1 [L70] SORT_5 init_35_arg_1 = var_29; [L71] state_34 = init_35_arg_1 [L72] SORT_1 init_37_arg_1 = var_9; [L73] state_36 = init_37_arg_1 [L74] SORT_1 init_40_arg_1 = var_9; [L75] state_39 = init_40_arg_1 [L76] SORT_1 init_42_arg_1 = var_9; [L77] state_41 = init_42_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, mask_SORT_1=255, mask_SORT_5=1, msb_SORT_1=128, msb_SORT_5=1, state_10=0, state_12=0, state_21=0, state_23=0, state_25=0, state_30=0, state_32=0, state_34=0, state_36=0, state_39=0, state_41=0, var_17=1, var_29=0, var_75=1, var_9=0] [L80] input_2 = __VERIFIER_nondet_uchar() [L81] input_3 = __VERIFIER_nondet_uchar() [L82] input_4 = __VERIFIER_nondet_uchar() [L83] input_6 = __VERIFIER_nondet_uchar() [L84] input_7 = __VERIFIER_nondet_uchar() [L85] input_7 = input_7 & mask_SORT_5 [L86] input_8 = __VERIFIER_nondet_uchar() [L87] input_8 = input_8 & mask_SORT_5 [L88] input_27 = __VERIFIER_nondet_uchar() [L91] SORT_1 var_14_arg_0 = state_10; [L92] SORT_1 var_14_arg_1 = state_12; [L93] SORT_5 var_14 = var_14_arg_0 == var_14_arg_1; [L94] SORT_5 var_18_arg_0 = var_14; [L95] SORT_5 var_18 = ~var_18_arg_0; [L96] SORT_5 var_19_arg_0 = var_17; [L97] SORT_5 var_19_arg_1 = var_18; [L98] SORT_5 var_19 = var_19_arg_0 & var_19_arg_1; [L99] var_19 = var_19 & mask_SORT_5 [L100] SORT_5 bad_20_arg_0 = var_19; [L101] CALL __VERIFIER_assert(!(bad_20_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: 0.5s, 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, 0.2s 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 04:06:55,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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 a719cfd0aa0307b53bbfa04d6ae952f8595dfb767fda2449e02648cf175d9360 --- 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 04:06:58,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:06:58,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:06:58,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:06:58,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:06:58,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:06:58,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:06:58,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:06:58,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:06:58,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:06:58,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:06:58,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:06:58,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:06:58,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:06:58,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:06:58,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:06:58,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:06:58,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:06:58,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:06:58,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:06:58,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:06:58,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:06:58,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:06:58,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:06:58,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:06:58,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:06:58,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:06:58,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:06:58,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:06:58,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:06:58,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:06:58,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:06:58,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:06:58,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:06:58,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:06:58,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:06:58,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:06:58,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:06:58,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:06:58,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:06:58,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:06:58,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:06:58,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:06:58,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:06:58,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:06:58,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:06:58,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:06:58,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:06:58,307 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:06:58,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:06:58,308 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:06:58,308 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:06:58,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:06:58,310 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:06:58,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:06:58,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:06:58,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:06:58,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:06:58,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:06:58,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:06:58,313 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:06:58,313 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:06:58,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:06:58,314 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:06:58,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:06:58,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:06:58,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:06:58,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:06:58,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:06:58,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:06:58,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:06:58,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:06:58,316 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:06:58,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:58,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:06:58,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:06:58,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:06:58,318 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a719cfd0aa0307b53bbfa04d6ae952f8595dfb767fda2449e02648cf175d9360 [2022-11-03 04:06:58,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:06:58,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:06:58,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:06:58,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:06:58,785 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:06:58,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:06:58,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/0dc50fe81/ca3425d744ff4e738eacef7c40a92933/FLAG6cef8da66 [2022-11-03 04:06:59,488 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:06:59,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:06:59,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/0dc50fe81/ca3425d744ff4e738eacef7c40a92933/FLAG6cef8da66 [2022-11-03 04:06:59,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/data/0dc50fe81/ca3425d744ff4e738eacef7c40a92933 [2022-11-03 04:06:59,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:06:59,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:06:59,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:06:59,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:06:59,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:06:59,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:59" (1/1) ... [2022-11-03 04:06:59,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ec7f1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:06:59, skipping insertion in model container [2022-11-03 04:06:59,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:06:59" (1/1) ... [2022-11-03 04:06:59,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:06:59,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:07:00,035 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c[1107,1120] [2022-11-03 04:07:00,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:00,128 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:07:00,172 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_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.eq_sdp_v4.c[1107,1120] [2022-11-03 04:07:00,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:00,224 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:07:00,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00 WrapperNode [2022-11-03 04:07:00,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:07:00,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:00,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:07:00,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:07:00,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,243 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,288 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 284 [2022-11-03 04:07:00,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:00,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:07:00,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:07:00,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:07:00,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:07:00,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:07:00,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:07:00,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:07:00,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (1/1) ... [2022-11-03 04:07:00,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:07:00,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:00,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:07:00,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:07:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:07:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:07:00,595 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:07:00,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:07:01,070 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:07:01,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:07:01,079 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:07:01,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:01 BoogieIcfgContainer [2022-11-03 04:07:01,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:07:01,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:07:01,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:07:01,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:07:01,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:06:59" (1/3) ... [2022-11-03 04:07:01,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ab5ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:01, skipping insertion in model container [2022-11-03 04:07:01,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:00" (2/3) ... [2022-11-03 04:07:01,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ab5ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:01, skipping insertion in model container [2022-11-03 04:07:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:01" (3/3) ... [2022-11-03 04:07:01,101 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.eq_sdp_v4.c [2022-11-03 04:07:01,120 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:07:01,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:07:01,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:07:01,206 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;@45d316a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:07:01,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:07:01,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 40 states have internal predecessors, (58), 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 04:07:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:07:01,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:01,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:07:01,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:07:01,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:01,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672201070] [2022-11-03 04:07:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:01,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:01,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:01,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:01,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:07:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:07:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:01,618 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 04:07:01,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:01,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672201070] [2022-11-03 04:07:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672201070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:01,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:01,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189975291] [2022-11-03 04:07:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:01,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:01,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:01,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:01,659 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 40 states have internal predecessors, (58), 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 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 04:07:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:01,739 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2022-11-03 04:07:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-03 04:07:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:01,750 INFO L225 Difference]: With dead ends: 110 [2022-11-03 04:07:01,750 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 04:07:01,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:07:01,756 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:01,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 145 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:01,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 04:07:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2022-11-03 04:07:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 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 04:07:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2022-11-03 04:07:01,792 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 5 [2022-11-03 04:07:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:01,792 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2022-11-03 04:07:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 04:07:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2022-11-03 04:07:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:01,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:01,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:01,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:02,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:02,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:02,009 INFO L85 PathProgramCache]: Analyzing trace with hash -473289749, now seen corresponding path program 1 times [2022-11-03 04:07:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:02,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838193538] [2022-11-03 04:07:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:02,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:02,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:02,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:02,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:07:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:02,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:02,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838193538] [2022-11-03 04:07:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838193538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:02,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:02,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141845292] [2022-11-03 04:07:02,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:02,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:02,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:02,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:02,523 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:02,711 INFO L93 Difference]: Finished difference Result 126 states and 179 transitions. [2022-11-03 04:07:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:07:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:02,713 INFO L225 Difference]: With dead ends: 126 [2022-11-03 04:07:02,713 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 04:07:02,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:02,715 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 125 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:02,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 383 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-11-03 04:07:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 04:07:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2022-11-03 04:07:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 56 states have internal predecessors, (80), 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 04:07:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-11-03 04:07:02,729 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 38 [2022-11-03 04:07:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:02,730 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-11-03 04:07:02,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-11-03 04:07:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:02,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:02,732 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:02,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:02,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:02,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1115058153, now seen corresponding path program 1 times [2022-11-03 04:07:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:02,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966006372] [2022-11-03 04:07:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:02,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:07:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:07:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:03,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:03,262 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:03,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966006372] [2022-11-03 04:07:03,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966006372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:03,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:03,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900862196] [2022-11-03 04:07:03,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:03,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:03,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:03,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:03,265 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 04:07:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:03,307 INFO L93 Difference]: Finished difference Result 155 states and 221 transitions. [2022-11-03 04:07:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:03,309 INFO L225 Difference]: With dead ends: 155 [2022-11-03 04:07:03,310 INFO L226 Difference]: Without dead ends: 120 [2022-11-03 04:07:03,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 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 04:07:03,312 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 90 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:03,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 192 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-03 04:07:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2022-11-03 04:07:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 74 states have internal predecessors, (106), 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 04:07:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2022-11-03 04:07:03,322 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2022-11-03 04:07:03,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:03,322 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2022-11-03 04:07:03,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 04:07:03,323 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2022-11-03 04:07:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:03,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:03,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:03,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:03,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -164805525, now seen corresponding path program 1 times [2022-11-03 04:07:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:03,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798843797] [2022-11-03 04:07:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:03,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:03,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:03,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:03,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:07:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:07:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:04,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:05,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798843797] [2022-11-03 04:07:05,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798843797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [351606172] [2022-11-03 04:07:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:05,123 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:05,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:05,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 04:07:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:07:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:06,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [351606172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080922246] [2022-11-03 04:07:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:06,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:06,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:07:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:06,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:07:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:06,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080922246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:06,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:06,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 04:07:06,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046514678] [2022-11-03 04:07:06,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:07:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:07:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:07:06,916 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 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 04:07:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:08,200 INFO L93 Difference]: Finished difference Result 242 states and 346 transitions. [2022-11-03 04:07:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 04:07:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 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 38 [2022-11-03 04:07:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:08,203 INFO L225 Difference]: With dead ends: 242 [2022-11-03 04:07:08,203 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 04:07:08,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=472, Invalid=1250, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:07:08,205 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1359 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:08,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 428 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 177 Invalid, 0 Unknown, 333 Unchecked, 0.3s Time] [2022-11-03 04:07:08,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 04:07:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 120. [2022-11-03 04:07:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4285714285714286) internal successors, (170), 119 states have internal predecessors, (170), 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 04:07:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2022-11-03 04:07:08,217 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 170 transitions. Word has length 38 [2022-11-03 04:07:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:08,218 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 170 transitions. [2022-11-03 04:07:08,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 22 states have internal predecessors, (78), 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 04:07:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 170 transitions. [2022-11-03 04:07:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:08,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:08,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:08,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:08,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 04:07:08,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:08,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:08,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:08,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:08,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1221397869, now seen corresponding path program 1 times [2022-11-03 04:07:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:08,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574608039] [2022-11-03 04:07:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:08,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:08,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:07:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:09,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:09,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574608039] [2022-11-03 04:07:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574608039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:09,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:09,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708332511] [2022-11-03 04:07:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:09,143 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:09,302 INFO L93 Difference]: Finished difference Result 209 states and 296 transitions. [2022-11-03 04:07:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:07:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:09,303 INFO L225 Difference]: With dead ends: 209 [2022-11-03 04:07:09,303 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 04:07:09,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:09,305 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 127 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:09,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 326 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 04:07:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 04:07:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2022-11-03 04:07:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.4205607476635513) internal successors, (152), 107 states have internal predecessors, (152), 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 04:07:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 152 transitions. [2022-11-03 04:07:09,314 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 152 transitions. Word has length 38 [2022-11-03 04:07:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:09,314 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-11-03 04:07:09,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 152 transitions. [2022-11-03 04:07:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:09,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:09,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:09,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:09,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:09,529 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1825539985, now seen corresponding path program 1 times [2022-11-03 04:07:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:09,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054323731] [2022-11-03 04:07:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:09,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:09,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:09,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:07:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:09,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:09,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:09,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:09,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054323731] [2022-11-03 04:07:09,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054323731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:09,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:09,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307029362] [2022-11-03 04:07:09,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:09,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:09,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:09,808 INFO L87 Difference]: Start difference. First operand 108 states and 152 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:09,912 INFO L93 Difference]: Finished difference Result 218 states and 309 transitions. [2022-11-03 04:07:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 04:07:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:09,916 INFO L225 Difference]: With dead ends: 218 [2022-11-03 04:07:09,916 INFO L226 Difference]: Without dead ends: 138 [2022-11-03 04:07:09,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:09,919 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 48 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:09,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 529 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 04:07:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-03 04:07:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2022-11-03 04:07:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.411214953271028) internal successors, (151), 107 states have internal predecessors, (151), 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 04:07:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 151 transitions. [2022-11-03 04:07:09,939 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 151 transitions. Word has length 38 [2022-11-03 04:07:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:09,940 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 151 transitions. [2022-11-03 04:07:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 151 transitions. [2022-11-03 04:07:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:09,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:09,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:09,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:10,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:10,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash -439336591, now seen corresponding path program 1 times [2022-11-03 04:07:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:10,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353724708] [2022-11-03 04:07:10,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:10,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:10,163 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:10,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:07:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:10,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:10,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:10,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353724708] [2022-11-03 04:07:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353724708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:10,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:10,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231195233] [2022-11-03 04:07:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:10,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:10,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:10,450 INFO L87 Difference]: Start difference. First operand 108 states and 151 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:10,547 INFO L93 Difference]: Finished difference Result 267 states and 375 transitions. [2022-11-03 04:07:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:10,549 INFO L225 Difference]: With dead ends: 267 [2022-11-03 04:07:10,550 INFO L226 Difference]: Without dead ends: 189 [2022-11-03 04:07:10,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:10,551 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 83 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:10,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 443 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 04:07:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-03 04:07:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 108. [2022-11-03 04:07:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.4018691588785046) internal successors, (150), 107 states have internal predecessors, (150), 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 04:07:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 150 transitions. [2022-11-03 04:07:10,560 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 150 transitions. Word has length 38 [2022-11-03 04:07:10,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:10,560 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 150 transitions. [2022-11-03 04:07:10,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 150 transitions. [2022-11-03 04:07:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:10,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:10,562 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:10,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:10,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1483891443, now seen corresponding path program 1 times [2022-11-03 04:07:10,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:10,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776419406] [2022-11-03 04:07:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:10,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:10,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:10,777 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:10,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:07:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:11,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776419406] [2022-11-03 04:07:11,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776419406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:11,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:11,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275403546] [2022-11-03 04:07:11,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:11,021 INFO L87 Difference]: Start difference. First operand 108 states and 150 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:11,116 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-11-03 04:07:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:11,118 INFO L225 Difference]: With dead ends: 259 [2022-11-03 04:07:11,118 INFO L226 Difference]: Without dead ends: 183 [2022-11-03 04:07:11,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:11,122 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 77 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:11,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 534 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-03 04:07:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-03 04:07:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 108. [2022-11-03 04:07:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 107 states have internal predecessors, (149), 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 04:07:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 149 transitions. [2022-11-03 04:07:11,143 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 149 transitions. Word has length 38 [2022-11-03 04:07:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 149 transitions. [2022-11-03 04:07:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 149 transitions. [2022-11-03 04:07:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:11,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,148 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:11,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,350 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1624440053, now seen corresponding path program 1 times [2022-11-03 04:07:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857106514] [2022-11-03 04:07:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:11,353 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:11,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:07:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:11,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:11,654 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:11,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857106514] [2022-11-03 04:07:11,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857106514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:11,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:11,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:11,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53263865] [2022-11-03 04:07:11,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:11,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:11,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:11,657 INFO L87 Difference]: Start difference. First operand 108 states and 149 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:11,758 INFO L93 Difference]: Finished difference Result 247 states and 345 transitions. [2022-11-03 04:07:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:11,760 INFO L225 Difference]: With dead ends: 247 [2022-11-03 04:07:11,760 INFO L226 Difference]: Without dead ends: 173 [2022-11-03 04:07:11,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:11,761 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 103 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:11,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 559 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-11-03 04:07:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-03 04:07:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 108. [2022-11-03 04:07:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3831775700934579) internal successors, (148), 107 states have internal predecessors, (148), 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 04:07:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2022-11-03 04:07:11,768 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 38 [2022-11-03 04:07:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:11,768 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2022-11-03 04:07:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2022-11-03 04:07:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:11,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,770 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:11,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash -180998281, now seen corresponding path program 1 times [2022-11-03 04:07:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:11,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013079435] [2022-11-03 04:07:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:11,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:11,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:07:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:12,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:12,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:12,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013079435] [2022-11-03 04:07:12,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013079435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:12,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:12,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598217417] [2022-11-03 04:07:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:12,232 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:12,330 INFO L93 Difference]: Finished difference Result 239 states and 332 transitions. [2022-11-03 04:07:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:12,332 INFO L225 Difference]: With dead ends: 239 [2022-11-03 04:07:12,332 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 04:07:12,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:12,333 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 133 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:12,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 401 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 04:07:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 04:07:12,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 108. [2022-11-03 04:07:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3738317757009346) internal successors, (147), 107 states have internal predecessors, (147), 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 04:07:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2022-11-03 04:07:12,340 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 38 [2022-11-03 04:07:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:12,340 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2022-11-03 04:07:12,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2022-11-03 04:07:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:12,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:12,342 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:12,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:12,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:12,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 241703545, now seen corresponding path program 1 times [2022-11-03 04:07:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:12,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307455319] [2022-11-03 04:07:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:12,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:12,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:12,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:07:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:12,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:12,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307455319] [2022-11-03 04:07:12,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307455319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:12,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:12,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185305361] [2022-11-03 04:07:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:12,825 INFO L87 Difference]: Start difference. First operand 108 states and 147 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:12,921 INFO L93 Difference]: Finished difference Result 231 states and 319 transitions. [2022-11-03 04:07:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:12,923 INFO L225 Difference]: With dead ends: 231 [2022-11-03 04:07:12,924 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 04:07:12,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:12,925 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 125 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:12,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 388 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 51 Unchecked, 0.0s Time] [2022-11-03 04:07:12,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 04:07:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 108. [2022-11-03 04:07:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3644859813084111) internal successors, (146), 107 states have internal predecessors, (146), 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 04:07:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2022-11-03 04:07:12,931 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 38 [2022-11-03 04:07:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:12,931 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2022-11-03 04:07:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2022-11-03 04:07:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:12,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:12,933 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:12,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:13,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1447240197, now seen corresponding path program 1 times [2022-11-03 04:07:13,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:13,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701374470] [2022-11-03 04:07:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:13,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:13,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:07:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:13,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:13,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:13,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701374470] [2022-11-03 04:07:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701374470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:13,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:13,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545350005] [2022-11-03 04:07:13,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:13,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:13,437 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:13,546 INFO L93 Difference]: Finished difference Result 211 states and 291 transitions. [2022-11-03 04:07:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:13,549 INFO L225 Difference]: With dead ends: 211 [2022-11-03 04:07:13,549 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 04:07:13,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:13,550 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 71 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:13,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 474 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-11-03 04:07:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 04:07:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2022-11-03 04:07:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 109 states have internal predecessors, (148), 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 04:07:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 148 transitions. [2022-11-03 04:07:13,559 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 148 transitions. Word has length 38 [2022-11-03 04:07:13,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:13,559 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 148 transitions. [2022-11-03 04:07:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 04:07:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 148 transitions. [2022-11-03 04:07:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:13,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:13,560 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:13,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2034046211, now seen corresponding path program 1 times [2022-11-03 04:07:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:13,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967692800] [2022-11-03 04:07:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:13,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:13,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:07:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:13,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:13,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967692800] [2022-11-03 04:07:13,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967692800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:13,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045376594] [2022-11-03 04:07:13,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:13,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:13,967 INFO L87 Difference]: Start difference. First operand 110 states and 148 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 04:07:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:14,042 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2022-11-03 04:07:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:07:14,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:14,044 INFO L225 Difference]: With dead ends: 291 [2022-11-03 04:07:14,044 INFO L226 Difference]: Without dead ends: 225 [2022-11-03 04:07:14,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:14,045 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 124 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:14,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 345 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-03 04:07:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 132. [2022-11-03 04:07:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.3740458015267176) internal successors, (180), 131 states have internal predecessors, (180), 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 04:07:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-11-03 04:07:14,057 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 38 [2022-11-03 04:07:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:14,058 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-11-03 04:07:14,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 04:07:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-11-03 04:07:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:14,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:14,059 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:14,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:14,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:14,277 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash -259038849, now seen corresponding path program 1 times [2022-11-03 04:07:14,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:14,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136672882] [2022-11-03 04:07:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:14,279 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:14,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:07:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:14,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:14,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136672882] [2022-11-03 04:07:14,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136672882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:14,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:14,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:14,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909424487] [2022-11-03 04:07:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:14,468 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 04:07:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:14,547 INFO L93 Difference]: Finished difference Result 315 states and 440 transitions. [2022-11-03 04:07:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:07:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:14,549 INFO L225 Difference]: With dead ends: 315 [2022-11-03 04:07:14,549 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 04:07:14,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:14,550 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 121 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:14,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 346 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 04:07:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2022-11-03 04:07:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.368421052631579) internal successors, (182), 133 states have internal predecessors, (182), 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 04:07:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2022-11-03 04:07:14,558 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 38 [2022-11-03 04:07:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:14,559 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2022-11-03 04:07:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 04:07:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2022-11-03 04:07:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:14,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:14,560 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:14,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:14,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:14,773 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -257191807, now seen corresponding path program 1 times [2022-11-03 04:07:14,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:14,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110371318] [2022-11-03 04:07:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:14,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 04:07:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:07:14,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:15,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:16,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110371318] [2022-11-03 04:07:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110371318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [383058050] [2022-11-03 04:07:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:16,326 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:16,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 04:07:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:07:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:17,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [383058050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386759959] [2022-11-03 04:07:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:17,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:17,168 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:17,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 04:07:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 04:07:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:17,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:18,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386759959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:18,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:18,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 24 [2022-11-03 04:07:18,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912403119] [2022-11-03 04:07:18,026 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:18,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 04:07:18,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 04:07:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:07:18,027 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 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 04:07:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:18,636 INFO L93 Difference]: Finished difference Result 271 states and 368 transitions. [2022-11-03 04:07:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 04:07:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 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 38 [2022-11-03 04:07:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:18,639 INFO L225 Difference]: With dead ends: 271 [2022-11-03 04:07:18,639 INFO L226 Difference]: Without dead ends: 269 [2022-11-03 04:07:18,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:07:18,640 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 458 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:18,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 838 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-11-03 04:07:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-03 04:07:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 160. [2022-11-03 04:07:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3270440251572326) internal successors, (211), 159 states have internal predecessors, (211), 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 04:07:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 211 transitions. [2022-11-03 04:07:18,649 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 211 transitions. Word has length 38 [2022-11-03 04:07:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:18,649 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 211 transitions. [2022-11-03 04:07:18,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 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 04:07:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 211 transitions. [2022-11-03 04:07:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 04:07:18,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:18,650 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:18,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:18,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:19,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:19,263 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash -958791681, now seen corresponding path program 1 times [2022-11-03 04:07:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642029537] [2022-11-03 04:07:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:19,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:19,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:19,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 04:07:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:07:19,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:19,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:19,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642029537] [2022-11-03 04:07:19,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642029537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:19,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:19,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819999256] [2022-11-03 04:07:19,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:19,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:19,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:19,385 INFO L87 Difference]: Start difference. First operand 160 states and 211 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 04:07:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:19,413 INFO L93 Difference]: Finished difference Result 365 states and 502 transitions. [2022-11-03 04:07:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:19,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 38 [2022-11-03 04:07:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:19,415 INFO L225 Difference]: With dead ends: 365 [2022-11-03 04:07:19,415 INFO L226 Difference]: Without dead ends: 241 [2022-11-03 04:07:19,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 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 04:07:19,416 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 128 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:19,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 153 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-03 04:07:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 142. [2022-11-03 04:07:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3475177304964538) internal successors, (190), 141 states have internal predecessors, (190), 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 04:07:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2022-11-03 04:07:19,425 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 38 [2022-11-03 04:07:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:19,425 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2022-11-03 04:07:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 04:07:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2022-11-03 04:07:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:19,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:19,426 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:19,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:19,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:19,638 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash 764747083, now seen corresponding path program 1 times [2022-11-03 04:07:19,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:19,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159815932] [2022-11-03 04:07:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:19,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:19,641 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 04:07:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:20,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:20,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:20,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159815932] [2022-11-03 04:07:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159815932] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:20,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:20,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:07:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45123951] [2022-11-03 04:07:20,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:20,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:20,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:20,071 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:20,236 INFO L93 Difference]: Finished difference Result 252 states and 341 transitions. [2022-11-03 04:07:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:20,238 INFO L225 Difference]: With dead ends: 252 [2022-11-03 04:07:20,238 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 04:07:20,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:07:20,239 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 270 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:20,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 224 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 04:07:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 118. [2022-11-03 04:07:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3076923076923077) internal successors, (153), 117 states have internal predecessors, (153), 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 04:07:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-11-03 04:07:20,255 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 71 [2022-11-03 04:07:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:20,256 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-11-03 04:07:20,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-11-03 04:07:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:20,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:20,258 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:20,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:20,458 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1083011535, now seen corresponding path program 1 times [2022-11-03 04:07:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464256890] [2022-11-03 04:07:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:20,461 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:20,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:07:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:20,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:20,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:20,899 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464256890] [2022-11-03 04:07:20,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464256890] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:20,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030705388] [2022-11-03 04:07:20,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:20,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:20,905 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:21,040 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-11-03 04:07:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:21,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:21,045 INFO L225 Difference]: With dead ends: 195 [2022-11-03 04:07:21,045 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 04:07:21,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:07:21,046 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 172 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:21,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 222 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 04:07:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2022-11-03 04:07:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2991452991452992) internal successors, (152), 117 states have internal predecessors, (152), 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 04:07:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2022-11-03 04:07:21,054 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 71 [2022-11-03 04:07:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:21,054 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2022-11-03 04:07:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2022-11-03 04:07:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:21,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:21,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:21,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:21,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:21,270 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:21,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1825752367, now seen corresponding path program 1 times [2022-11-03 04:07:21,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:21,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302693136] [2022-11-03 04:07:21,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:21,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:21,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:21,273 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:21,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 04:07:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:21,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:21,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302693136] [2022-11-03 04:07:21,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302693136] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:21,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:21,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:21,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634592082] [2022-11-03 04:07:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:21,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:21,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:21,699 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:21,864 INFO L93 Difference]: Finished difference Result 240 states and 318 transitions. [2022-11-03 04:07:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:21,866 INFO L225 Difference]: With dead ends: 240 [2022-11-03 04:07:21,866 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:07:21,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:21,867 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 173 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:21,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 322 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:07:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-11-03 04:07:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2905982905982907) internal successors, (151), 117 states have internal predecessors, (151), 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 04:07:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2022-11-03 04:07:21,874 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 71 [2022-11-03 04:07:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:21,874 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2022-11-03 04:07:21,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2022-11-03 04:07:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:21,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:21,876 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:21,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:22,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:22,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 97475667, now seen corresponding path program 1 times [2022-11-03 04:07:22,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:22,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507876026] [2022-11-03 04:07:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:22,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:22,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:22,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 04:07:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:22,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:22,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507876026] [2022-11-03 04:07:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507876026] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:22,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:22,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153131176] [2022-11-03 04:07:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:22,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:22,520 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:22,688 INFO L93 Difference]: Finished difference Result 240 states and 315 transitions. [2022-11-03 04:07:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:22,689 INFO L225 Difference]: With dead ends: 240 [2022-11-03 04:07:22,689 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:07:22,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:22,690 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 169 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:22,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 323 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:07:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-11-03 04:07:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2820512820512822) internal successors, (150), 117 states have internal predecessors, (150), 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 04:07:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 150 transitions. [2022-11-03 04:07:22,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 150 transitions. Word has length 71 [2022-11-03 04:07:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:22,698 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 150 transitions. [2022-11-03 04:07:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 150 transitions. [2022-11-03 04:07:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:22,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:22,699 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:22,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:22,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:22,911 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 238024277, now seen corresponding path program 1 times [2022-11-03 04:07:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009879827] [2022-11-03 04:07:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:22,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:22,914 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:22,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:07:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:23,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:23,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009879827] [2022-11-03 04:07:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009879827] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:23,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450754958] [2022-11-03 04:07:23,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:23,366 INFO L87 Difference]: Start difference. First operand 118 states and 150 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:23,532 INFO L93 Difference]: Finished difference Result 240 states and 312 transitions. [2022-11-03 04:07:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:23,533 INFO L225 Difference]: With dead ends: 240 [2022-11-03 04:07:23,533 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:07:23,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:23,534 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 163 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:23,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 330 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:07:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-11-03 04:07:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2735042735042734) internal successors, (149), 117 states have internal predecessors, (149), 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 04:07:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2022-11-03 04:07:23,541 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 71 [2022-11-03 04:07:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:23,542 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2022-11-03 04:07:23,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2022-11-03 04:07:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:23,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:23,543 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:23,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:23,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:23,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1567414057, now seen corresponding path program 1 times [2022-11-03 04:07:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301396198] [2022-11-03 04:07:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:23,757 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:23,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 04:07:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:24,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:24,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301396198] [2022-11-03 04:07:24,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301396198] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:24,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:24,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:24,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522126125] [2022-11-03 04:07:24,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:24,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:24,169 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:24,346 INFO L93 Difference]: Finished difference Result 240 states and 309 transitions. [2022-11-03 04:07:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:24,350 INFO L225 Difference]: With dead ends: 240 [2022-11-03 04:07:24,350 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:07:24,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:24,351 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 161 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:24,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 325 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:07:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-11-03 04:07:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.264957264957265) internal successors, (148), 117 states have internal predecessors, (148), 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 04:07:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2022-11-03 04:07:24,360 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 71 [2022-11-03 04:07:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:24,360 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2022-11-03 04:07:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2022-11-03 04:07:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:24,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:24,362 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:24,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:24,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:24,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1144712231, now seen corresponding path program 1 times [2022-11-03 04:07:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333916510] [2022-11-03 04:07:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:24,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:24,577 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 04:07:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:07:24,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:25,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333916510] [2022-11-03 04:07:25,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333916510] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:25,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:25,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 04:07:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473104106] [2022-11-03 04:07:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:07:25,045 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:25,228 INFO L93 Difference]: Finished difference Result 240 states and 306 transitions. [2022-11-03 04:07:25,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:07:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:25,229 INFO L225 Difference]: With dead ends: 240 [2022-11-03 04:07:25,229 INFO L226 Difference]: Without dead ends: 174 [2022-11-03 04:07:25,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:25,231 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 157 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:25,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 326 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-03 04:07:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-11-03 04:07:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2564102564102564) internal successors, (147), 117 states have internal predecessors, (147), 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 04:07:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-11-03 04:07:25,238 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 71 [2022-11-03 04:07:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:25,239 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-11-03 04:07:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 04:07:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-11-03 04:07:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:25,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:25,240 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:25,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:25,453 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1461311323, now seen corresponding path program 1 times [2022-11-03 04:07:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108433403] [2022-11-03 04:07:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:25,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:25,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:07:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:07:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:25,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:26,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108433403] [2022-11-03 04:07:26,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108433403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:26,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319806449] [2022-11-03 04:07:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:26,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:26,164 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:26,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 04:07:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 04:07:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:07:26,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:26,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1319806449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:26,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:07:26,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 16 [2022-11-03 04:07:26,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755180746] [2022-11-03 04:07:26,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:26,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:26,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-03 04:07:26,441 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 04:07:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:26,584 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2022-11-03 04:07:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:07:26,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 71 [2022-11-03 04:07:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:26,586 INFO L225 Difference]: With dead ends: 242 [2022-11-03 04:07:26,586 INFO L226 Difference]: Without dead ends: 176 [2022-11-03 04:07:26,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:07:26,587 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 116 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:26,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 263 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-03 04:07:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 118. [2022-11-03 04:07:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 117 states have internal predecessors, (146), 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 04:07:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2022-11-03 04:07:26,595 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 71 [2022-11-03 04:07:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:26,595 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2022-11-03 04:07:26,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 04:07:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2022-11-03 04:07:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:26,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:26,596 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:26,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:26,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:27,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:27,007 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash 874505309, now seen corresponding path program 1 times [2022-11-03 04:07:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:27,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725480702] [2022-11-03 04:07:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:27,009 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:27,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 04:07:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:07:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:27,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:27,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725480702] [2022-11-03 04:07:27,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725480702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:27,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914035748] [2022-11-03 04:07:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:27,670 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:27,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 04:07:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 04:07:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:28,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:28,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914035748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:28,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035986495] [2022-11-03 04:07:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:28,382 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:28,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 04:07:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:07:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:28,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035986495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:28,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:28,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 8, 8, 8] total 15 [2022-11-03 04:07:28,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345041960] [2022-11-03 04:07:28,922 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:28,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 04:07:28,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 04:07:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-03 04:07:28,924 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 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 04:07:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:29,479 INFO L93 Difference]: Finished difference Result 461 states and 605 transitions. [2022-11-03 04:07:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 04:07:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 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 71 [2022-11-03 04:07:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:29,481 INFO L225 Difference]: With dead ends: 461 [2022-11-03 04:07:29,482 INFO L226 Difference]: Without dead ends: 395 [2022-11-03 04:07:29,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 405 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 04:07:29,483 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 800 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:29,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 550 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 117 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-11-03 04:07:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-03 04:07:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 201. [2022-11-03 04:07:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.295) internal successors, (259), 200 states have internal predecessors, (259), 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 04:07:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2022-11-03 04:07:29,495 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 71 [2022-11-03 04:07:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:29,496 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2022-11-03 04:07:29,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 15 states have internal predecessors, (130), 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 04:07:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2022-11-03 04:07:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:29,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:29,497 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:29,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:29,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 04:07:29,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-03 04:07:30,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:30,101 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -405358369, now seen corresponding path program 1 times [2022-11-03 04:07:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:30,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737147919] [2022-11-03 04:07:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:30,103 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:30,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 04:07:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 04:07:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:30,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:33,542 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737147919] [2022-11-03 04:07:33,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737147919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [671138226] [2022-11-03 04:07:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:33,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:33,543 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 04:07:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 04:07:33,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:34,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:34,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [671138226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:34,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476008613] [2022-11-03 04:07:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:34,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:34,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:34,784 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:34,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 04:07:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 04:07:34,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:35,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:36,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476008613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:36,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 22, 22] total 42 [2022-11-03 04:07:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461139108] [2022-11-03 04:07:36,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 04:07:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 04:07:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1591, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 04:07:36,123 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 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 04:07:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:41,670 INFO L93 Difference]: Finished difference Result 743 states and 980 transitions. [2022-11-03 04:07:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-03 04:07:41,670 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 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 71 [2022-11-03 04:07:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:41,674 INFO L225 Difference]: With dead ends: 743 [2022-11-03 04:07:41,674 INFO L226 Difference]: Without dead ends: 741 [2022-11-03 04:07:41,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 386 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2336 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1621, Invalid=8885, Unknown=0, NotChecked=0, Total=10506 [2022-11-03 04:07:41,677 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1485 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1437 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:41,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 2420 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 889 Invalid, 0 Unknown, 1437 Unchecked, 0.9s Time] [2022-11-03 04:07:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-03 04:07:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 271. [2022-11-03 04:07:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3) internal successors, (351), 270 states have internal predecessors, (351), 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 04:07:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 351 transitions. [2022-11-03 04:07:41,701 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 351 transitions. Word has length 71 [2022-11-03 04:07:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:41,702 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 351 transitions. [2022-11-03 04:07:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4285714285714284) internal successors, (144), 42 states have internal predecessors, (144), 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 04:07:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 351 transitions. [2022-11-03 04:07:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:41,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:41,703 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:41,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:41,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:42,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-03 04:07:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:42,307 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1106958243, now seen corresponding path program 1 times [2022-11-03 04:07:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:42,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057665168] [2022-11-03 04:07:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:42,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:42,309 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:42,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 04:07:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:07:42,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:42,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:42,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057665168] [2022-11-03 04:07:42,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057665168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [23790465] [2022-11-03 04:07:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:42,677 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 04:07:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:07:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:43,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:43,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [23790465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904186352] [2022-11-03 04:07:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:43,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:43,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:43,081 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:43,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 04:07:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:07:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:43,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:43,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904186352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:43,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:43,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:07:43,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449029293] [2022-11-03 04:07:43,363 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:07:43,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:43,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:07:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:43,365 INFO L87 Difference]: Start difference. First operand 271 states and 351 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 04:07:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:43,722 INFO L93 Difference]: Finished difference Result 1221 states and 1592 transitions. [2022-11-03 04:07:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:07:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) Word has length 71 [2022-11-03 04:07:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:43,726 INFO L225 Difference]: With dead ends: 1221 [2022-11-03 04:07:43,726 INFO L226 Difference]: Without dead ends: 988 [2022-11-03 04:07:43,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 04:07:43,728 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 489 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:43,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 436 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-11-03 04:07:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 388. [2022-11-03 04:07:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.2997416020671835) internal successors, (503), 387 states have internal predecessors, (503), 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 04:07:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 503 transitions. [2022-11-03 04:07:43,765 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 503 transitions. Word has length 71 [2022-11-03 04:07:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:43,765 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 503 transitions. [2022-11-03 04:07:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 04:07:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 503 transitions. [2022-11-03 04:07:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:43,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:43,767 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:43,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:43,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 04:07:44,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 04:07:44,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:44,371 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1434717667, now seen corresponding path program 1 times [2022-11-03 04:07:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:44,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347875413] [2022-11-03 04:07:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:44,373 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:44,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 04:07:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:07:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:07:44,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:44,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347875413] [2022-11-03 04:07:44,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347875413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:44,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:44,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:44,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87235864] [2022-11-03 04:07:44,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:44,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:44,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:44,568 INFO L87 Difference]: Start difference. First operand 388 states and 503 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 04:07:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:44,649 INFO L93 Difference]: Finished difference Result 956 states and 1245 transitions. [2022-11-03 04:07:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:07:44,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 71 [2022-11-03 04:07:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:44,652 INFO L225 Difference]: With dead ends: 956 [2022-11-03 04:07:44,652 INFO L226 Difference]: Without dead ends: 604 [2022-11-03 04:07:44,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:44,653 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 179 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:44,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 207 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:07:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-03 04:07:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 388. [2022-11-03 04:07:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.2790697674418605) internal successors, (495), 387 states have internal predecessors, (495), 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 04:07:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 495 transitions. [2022-11-03 04:07:44,686 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 495 transitions. Word has length 71 [2022-11-03 04:07:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:44,686 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 495 transitions. [2022-11-03 04:07:44,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 04:07:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 495 transitions. [2022-11-03 04:07:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:44,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:44,688 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:44,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:44,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:44,897 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1522914333, now seen corresponding path program 1 times [2022-11-03 04:07:44,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:44,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192106414] [2022-11-03 04:07:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:44,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:44,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:44,898 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:44,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:07:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:45,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:07:45,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:45,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192106414] [2022-11-03 04:07:45,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192106414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:45,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:45,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:45,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518304768] [2022-11-03 04:07:45,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:45,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:45,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:45,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:45,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:45,152 INFO L87 Difference]: Start difference. First operand 388 states and 495 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 04:07:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:45,305 INFO L93 Difference]: Finished difference Result 992 states and 1258 transitions. [2022-11-03 04:07:45,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:07:45,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 71 [2022-11-03 04:07:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:45,308 INFO L225 Difference]: With dead ends: 992 [2022-11-03 04:07:45,308 INFO L226 Difference]: Without dead ends: 640 [2022-11-03 04:07:45,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:45,309 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:45,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 316 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:07:45,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-03 04:07:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 404. [2022-11-03 04:07:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.2679900744416874) internal successors, (511), 403 states have internal predecessors, (511), 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 04:07:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 511 transitions. [2022-11-03 04:07:45,343 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 511 transitions. Word has length 71 [2022-11-03 04:07:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:45,343 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 511 transitions. [2022-11-03 04:07:45,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 04:07:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 511 transitions. [2022-11-03 04:07:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:45,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:45,345 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:45,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:45,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:45,557 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:45,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1132981661, now seen corresponding path program 1 times [2022-11-03 04:07:45,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:45,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065922390] [2022-11-03 04:07:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:45,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:45,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:45,559 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 04:07:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:07:45,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:45,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:45,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065922390] [2022-11-03 04:07:45,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065922390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:45,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279856151] [2022-11-03 04:07:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:45,801 INFO L87 Difference]: Start difference. First operand 404 states and 511 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 04:07:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:45,926 INFO L93 Difference]: Finished difference Result 848 states and 1074 transitions. [2022-11-03 04:07:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:07:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 71 [2022-11-03 04:07:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:45,929 INFO L225 Difference]: With dead ends: 848 [2022-11-03 04:07:45,929 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 04:07:45,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:45,930 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 142 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:45,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 327 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-03 04:07:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 04:07:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 392. [2022-11-03 04:07:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.2710997442455243) internal successors, (497), 391 states have internal predecessors, (497), 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 04:07:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 497 transitions. [2022-11-03 04:07:45,963 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 497 transitions. Word has length 71 [2022-11-03 04:07:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:45,963 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 497 transitions. [2022-11-03 04:07:45,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 04:07:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 497 transitions. [2022-11-03 04:07:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:45,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:45,965 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:45,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:07:46,177 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:46,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:46,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1336544505, now seen corresponding path program 1 times [2022-11-03 04:07:46,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:46,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884364972] [2022-11-03 04:07:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:46,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:46,183 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 04:07:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 04:07:46,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:47,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:50,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884364972] [2022-11-03 04:07:50,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884364972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:50,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348964915] [2022-11-03 04:07:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:50,655 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:50,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:50,656 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:50,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 04:07:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 04:07:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:51,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:52,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348964915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:52,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757117515] [2022-11-03 04:07:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:52,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:52,169 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 04:07:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:52,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 04:07:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:52,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:53,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757117515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:53,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:53,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 24, 24] total 46 [2022-11-03 04:07:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436936536] [2022-11-03 04:07:53,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 04:07:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 04:07:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:07:53,865 INFO L87 Difference]: Start difference. First operand 392 states and 497 transitions. Second operand has 46 states, 46 states have (on average 3.130434782608696) internal successors, (144), 46 states have internal predecessors, (144), 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 04:07:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:56,737 INFO L93 Difference]: Finished difference Result 880 states and 1132 transitions. [2022-11-03 04:07:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 04:07:56,737 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.130434782608696) internal successors, (144), 46 states have internal predecessors, (144), 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 71 [2022-11-03 04:07:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:56,740 INFO L225 Difference]: With dead ends: 880 [2022-11-03 04:07:56,740 INFO L226 Difference]: Without dead ends: 878 [2022-11-03 04:07:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 374 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=507, Invalid=4895, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 04:07:56,742 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 544 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 4308 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:56,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 4308 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 873 Unchecked, 0.5s Time] [2022-11-03 04:07:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-11-03 04:07:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2022-11-03 04:07:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.25754060324826) internal successors, (542), 431 states have internal predecessors, (542), 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 04:07:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2022-11-03 04:07:56,779 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 71 [2022-11-03 04:07:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:56,780 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2022-11-03 04:07:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.130434782608696) internal successors, (144), 46 states have internal predecessors, (144), 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 04:07:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2022-11-03 04:07:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:56,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:56,781 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:56,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 04:07:56,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 04:07:57,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-03 04:07:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:57,393 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:57,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2038144379, now seen corresponding path program 1 times [2022-11-03 04:07:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472583785] [2022-11-03 04:07:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:57,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:57,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:57,395 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:57,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 04:07:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:57,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:07:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:57,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:57,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472583785] [2022-11-03 04:07:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472583785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1939454463] [2022-11-03 04:07:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:07:57,745 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:07:57,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 04:07:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:07:58,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:58,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:58,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1939454463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:58,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278392992] [2022-11-03 04:07:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:58,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:58,152 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:58,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 04:07:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:07:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:58,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:07:58,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278392992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:58,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:07:58,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 04:07:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233408842] [2022-11-03 04:07:58,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:07:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 04:07:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 04:07:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:58,430 INFO L87 Difference]: Start difference. First operand 432 states and 542 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 04:07:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:58,686 INFO L93 Difference]: Finished difference Result 1355 states and 1734 transitions. [2022-11-03 04:07:58,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 04:07:58,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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) Word has length 71 [2022-11-03 04:07:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:58,692 INFO L225 Difference]: With dead ends: 1355 [2022-11-03 04:07:58,692 INFO L226 Difference]: Without dead ends: 1003 [2022-11-03 04:07:58,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:07:58,693 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 378 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:58,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 642 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:07:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-03 04:07:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 420. [2022-11-03 04:07:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.260143198090692) internal successors, (528), 419 states have internal predecessors, (528), 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 04:07:58,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 528 transitions. [2022-11-03 04:07:58,732 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 528 transitions. Word has length 71 [2022-11-03 04:07:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:58,732 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 528 transitions. [2022-11-03 04:07:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 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 04:07:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 528 transitions. [2022-11-03 04:07:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:07:58,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:58,734 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:58,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:58,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:59,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-03 04:07:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:07:59,351 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -472100867, now seen corresponding path program 2 times [2022-11-03 04:07:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:07:59,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365460148] [2022-11-03 04:07:59,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:07:59,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:07:59,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:07:59,353 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:07:59,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:07:59,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:07:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:07:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:07:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:07:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:07:59,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:07:59,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365460148] [2022-11-03 04:07:59,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365460148] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:59,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:59,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:07:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579983354] [2022-11-03 04:07:59,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:59,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:07:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:07:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:07:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:07:59,843 INFO L87 Difference]: Start difference. First operand 420 states and 528 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 04:08:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:00,040 INFO L93 Difference]: Finished difference Result 779 states and 970 transitions. [2022-11-03 04:08:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:08:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 104 [2022-11-03 04:08:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:00,042 INFO L225 Difference]: With dead ends: 779 [2022-11-03 04:08:00,042 INFO L226 Difference]: Without dead ends: 427 [2022-11-03 04:08:00,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:08:00,043 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 185 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:00,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 231 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:08:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-03 04:08:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 341. [2022-11-03 04:08:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.2176470588235293) internal successors, (414), 340 states have internal predecessors, (414), 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 04:08:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 414 transitions. [2022-11-03 04:08:00,070 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 414 transitions. Word has length 104 [2022-11-03 04:08:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:00,070 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 414 transitions. [2022-11-03 04:08:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 04:08:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 414 transitions. [2022-11-03 04:08:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:00,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:00,072 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:00,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:00,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:00,286 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1656115329, now seen corresponding path program 2 times [2022-11-03 04:08:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:00,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981765027] [2022-11-03 04:08:00,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:00,289 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:00,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 04:08:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 04:08:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 04:08:00,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:00,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981765027] [2022-11-03 04:08:00,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981765027] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:08:00,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:08:00,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 04:08:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708640882] [2022-11-03 04:08:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:08:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:08:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:08:00,774 INFO L87 Difference]: Start difference. First operand 341 states and 414 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 04:08:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:00,933 INFO L93 Difference]: Finished difference Result 710 states and 866 transitions. [2022-11-03 04:08:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:08:00,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 104 [2022-11-03 04:08:00,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:00,941 INFO L225 Difference]: With dead ends: 710 [2022-11-03 04:08:00,941 INFO L226 Difference]: Without dead ends: 437 [2022-11-03 04:08:00,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-03 04:08:00,942 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 164 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:00,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 200 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:08:00,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-03 04:08:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 329. [2022-11-03 04:08:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.2134146341463414) internal successors, (398), 328 states have internal predecessors, (398), 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 04:08:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 398 transitions. [2022-11-03 04:08:00,965 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 398 transitions. Word has length 104 [2022-11-03 04:08:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:00,965 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 398 transitions. [2022-11-03 04:08:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 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 04:08:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 398 transitions. [2022-11-03 04:08:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:00,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:00,966 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:00,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:01,179 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:01,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2046048001, now seen corresponding path program 3 times [2022-11-03 04:08:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:01,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013167673] [2022-11-03 04:08:01,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:08:01,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:01,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:01,182 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:01,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 04:08:01,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:08:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:01,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:08:01,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:08:01,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:08:01,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013167673] [2022-11-03 04:08:01,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013167673] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:08:01,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:08:01,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-11-03 04:08:01,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356290642] [2022-11-03 04:08:01,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:01,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:08:01,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:01,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:08:01,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:08:01,694 INFO L87 Difference]: Start difference. First operand 329 states and 398 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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 04:08:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:01,923 INFO L93 Difference]: Finished difference Result 694 states and 852 transitions. [2022-11-03 04:08:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 04:08:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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) Word has length 104 [2022-11-03 04:08:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:01,924 INFO L225 Difference]: With dead ends: 694 [2022-11-03 04:08:01,925 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 04:08:01,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:08:01,925 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 163 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:01,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 221 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:08:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 04:08:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 246. [2022-11-03 04:08:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.2) internal successors, (294), 245 states have internal predecessors, (294), 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 04:08:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-11-03 04:08:01,958 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 104 [2022-11-03 04:08:01,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:01,959 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-11-03 04:08:01,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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 04:08:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-11-03 04:08:01,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:01,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:01,960 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:01,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:02,173 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash -220606871, now seen corresponding path program 2 times [2022-11-03 04:08:02,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:02,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736759332] [2022-11-03 04:08:02,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:02,176 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:02,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 04:08:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:02,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:08:02,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:04,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:12,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:12,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736759332] [2022-11-03 04:08:12,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736759332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:12,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1251406388] [2022-11-03 04:08:12,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:12,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:12,604 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:12,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 04:08:12,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:13,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 04:08:13,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:13,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:14,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1251406388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900013128] [2022-11-03 04:08:14,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:14,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:14,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:14,938 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:14,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 04:08:15,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 04:08:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:16,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900013128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34, 34, 35, 35] total 68 [2022-11-03 04:08:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35003239] [2022-11-03 04:08:17,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:17,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 04:08:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 04:08:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4365, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 04:08:17,484 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 68 states, 68 states have (on average 3.088235294117647) internal successors, (210), 68 states have internal predecessors, (210), 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 04:08:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:24,448 INFO L93 Difference]: Finished difference Result 762 states and 922 transitions. [2022-11-03 04:08:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 04:08:24,449 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.088235294117647) internal successors, (210), 68 states have internal predecessors, (210), 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 104 [2022-11-03 04:08:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:24,451 INFO L225 Difference]: With dead ends: 762 [2022-11-03 04:08:24,451 INFO L226 Difference]: Without dead ends: 760 [2022-11-03 04:08:24,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 550 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1066, Invalid=13696, Unknown=0, NotChecked=0, Total=14762 [2022-11-03 04:08:24,454 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1239 mSDsluCounter, 5682 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 5822 SdHoareTripleChecker+Invalid, 3930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2853 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:24,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 5822 Invalid, 3930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1046 Invalid, 0 Unknown, 2853 Unchecked, 0.9s Time] [2022-11-03 04:08:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-11-03 04:08:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 314. [2022-11-03 04:08:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.1980830670926517) internal successors, (375), 313 states have internal predecessors, (375), 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 04:08:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 375 transitions. [2022-11-03 04:08:24,485 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 375 transitions. Word has length 104 [2022-11-03 04:08:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 375 transitions. [2022-11-03 04:08:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.088235294117647) internal successors, (210), 68 states have internal predecessors, (210), 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 04:08:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 375 transitions. [2022-11-03 04:08:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:24,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:24,487 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:24,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:24,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:24,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:25,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:25,105 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -922206745, now seen corresponding path program 1 times [2022-11-03 04:08:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:25,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214080509] [2022-11-03 04:08:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:25,107 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:08:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:08:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:25,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214080509] [2022-11-03 04:08:25,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214080509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1791527116] [2022-11-03 04:08:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:25,828 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:25,829 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:25,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 04:08:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:26,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:08:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1791527116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:26,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582893991] [2022-11-03 04:08:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:26,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:26,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:26,577 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:26,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 04:08:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:08:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:27,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582893991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:27,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:27,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 04:08:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94067459] [2022-11-03 04:08:27,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 04:08:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 04:08:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 04:08:27,070 INFO L87 Difference]: Start difference. First operand 314 states and 375 transitions. Second operand has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 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 04:08:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:28,136 INFO L93 Difference]: Finished difference Result 1497 states and 1793 transitions. [2022-11-03 04:08:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 04:08:28,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 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 104 [2022-11-03 04:08:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:28,141 INFO L225 Difference]: With dead ends: 1497 [2022-11-03 04:08:28,141 INFO L226 Difference]: Without dead ends: 1285 [2022-11-03 04:08:28,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=647, Invalid=2323, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 04:08:28,143 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1635 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:28,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1056 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:08:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-03 04:08:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 421. [2022-11-03 04:08:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.1857142857142857) internal successors, (498), 420 states have internal predecessors, (498), 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 04:08:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 498 transitions. [2022-11-03 04:08:28,187 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 498 transitions. Word has length 104 [2022-11-03 04:08:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:28,188 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 498 transitions. [2022-11-03 04:08:28,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 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 04:08:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 498 transitions. [2022-11-03 04:08:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:28,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:28,189 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:28,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-03 04:08:28,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-03 04:08:28,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 04:08:28,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:28,794 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:28,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2131649429, now seen corresponding path program 1 times [2022-11-03 04:08:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220694444] [2022-11-03 04:08:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:28,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:28,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:28,796 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 04:08:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:28,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:08:28,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 04:08:29,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:29,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:29,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220694444] [2022-11-03 04:08:29,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220694444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:29,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:29,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:08:29,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900716338] [2022-11-03 04:08:29,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:08:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:08:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:08:29,028 INFO L87 Difference]: Start difference. First operand 421 states and 498 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 04:08:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:29,122 INFO L93 Difference]: Finished difference Result 887 states and 1055 transitions. [2022-11-03 04:08:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:08:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 104 [2022-11-03 04:08:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:29,124 INFO L225 Difference]: With dead ends: 887 [2022-11-03 04:08:29,125 INFO L226 Difference]: Without dead ends: 589 [2022-11-03 04:08:29,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:29,125 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 165 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:29,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 200 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:08:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-03 04:08:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 421. [2022-11-03 04:08:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.1714285714285715) internal successors, (492), 420 states have internal predecessors, (492), 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 04:08:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 492 transitions. [2022-11-03 04:08:29,165 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 492 transitions. Word has length 104 [2022-11-03 04:08:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:29,166 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 492 transitions. [2022-11-03 04:08:29,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 04:08:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 492 transitions. [2022-11-03 04:08:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:29,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:29,167 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:29,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:29,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:29,380 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:29,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1508482967, now seen corresponding path program 1 times [2022-11-03 04:08:29,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:29,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001191326] [2022-11-03 04:08:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:29,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:29,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:29,382 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:29,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 04:08:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 04:08:29,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:29,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001191326] [2022-11-03 04:08:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001191326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:29,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:29,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:08:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313612678] [2022-11-03 04:08:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:08:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:08:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:29,672 INFO L87 Difference]: Start difference. First operand 421 states and 492 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 04:08:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:29,809 INFO L93 Difference]: Finished difference Result 848 states and 994 transitions. [2022-11-03 04:08:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:08:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 104 [2022-11-03 04:08:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:29,812 INFO L225 Difference]: With dead ends: 848 [2022-11-03 04:08:29,812 INFO L226 Difference]: Without dead ends: 482 [2022-11-03 04:08:29,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:08:29,813 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 102 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:29,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 338 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 04:08:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-03 04:08:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 375. [2022-11-03 04:08:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.1764705882352942) internal successors, (440), 374 states have internal predecessors, (440), 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 04:08:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 440 transitions. [2022-11-03 04:08:29,850 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 440 transitions. Word has length 104 [2022-11-03 04:08:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:29,851 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 440 transitions. [2022-11-03 04:08:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 04:08:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 440 transitions. [2022-11-03 04:08:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:29,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:29,852 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:29,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:30,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:30,066 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:30,066 INFO L85 PathProgramCache]: Analyzing trace with hash -991340437, now seen corresponding path program 1 times [2022-11-03 04:08:30,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:30,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656143486] [2022-11-03 04:08:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:30,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:30,068 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:30,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 04:08:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:30,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-03 04:08:30,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:30,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:30,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656143486] [2022-11-03 04:08:30,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656143486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:30,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:30,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:08:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838306547] [2022-11-03 04:08:30,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:30,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:08:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:08:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:30,351 INFO L87 Difference]: Start difference. First operand 375 states and 440 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 04:08:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:30,481 INFO L93 Difference]: Finished difference Result 770 states and 899 transitions. [2022-11-03 04:08:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:08:30,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 104 [2022-11-03 04:08:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:30,484 INFO L225 Difference]: With dead ends: 770 [2022-11-03 04:08:30,484 INFO L226 Difference]: Without dead ends: 468 [2022-11-03 04:08:30,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:08:30,485 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 101 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:30,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 359 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-11-03 04:08:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-03 04:08:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 375. [2022-11-03 04:08:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.1684491978609626) internal successors, (437), 374 states have internal predecessors, (437), 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 04:08:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 437 transitions. [2022-11-03 04:08:30,520 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 437 transitions. Word has length 104 [2022-11-03 04:08:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:30,520 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 437 transitions. [2022-11-03 04:08:30,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 04:08:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 437 transitions. [2022-11-03 04:08:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:30,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:30,521 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:30,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:30,736 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2133778411, now seen corresponding path program 1 times [2022-11-03 04:08:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:30,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496281018] [2022-11-03 04:08:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:30,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:30,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:30,738 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:30,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:08:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 04:08:31,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:31,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:31,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496281018] [2022-11-03 04:08:31,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496281018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:31,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:31,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:08:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004669006] [2022-11-03 04:08:31,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:08:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:08:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:31,027 INFO L87 Difference]: Start difference. First operand 375 states and 437 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 04:08:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:31,145 INFO L93 Difference]: Finished difference Result 728 states and 847 transitions. [2022-11-03 04:08:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:08:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 104 [2022-11-03 04:08:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:31,147 INFO L225 Difference]: With dead ends: 728 [2022-11-03 04:08:31,147 INFO L226 Difference]: Without dead ends: 422 [2022-11-03 04:08:31,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:08:31,148 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:31,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 292 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-03 04:08:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-03 04:08:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 371. [2022-11-03 04:08:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.164864864864865) internal successors, (431), 370 states have internal predecessors, (431), 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 04:08:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 431 transitions. [2022-11-03 04:08:31,173 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 431 transitions. Word has length 104 [2022-11-03 04:08:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:31,173 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 431 transitions. [2022-11-03 04:08:31,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 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 04:08:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 431 transitions. [2022-11-03 04:08:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:31,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:31,174 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:31,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 04:08:31,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:31,374 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1251689389, now seen corresponding path program 1 times [2022-11-03 04:08:31,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:31,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369353971] [2022-11-03 04:08:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:08:31,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:31,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:31,376 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:31,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 04:08:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:08:31,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:08:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-03 04:08:31,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:08:31,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:31,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369353971] [2022-11-03 04:08:31,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369353971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:08:31,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:08:31,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:08:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117629499] [2022-11-03 04:08:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:08:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:08:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:08:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:08:31,654 INFO L87 Difference]: Start difference. First operand 371 states and 431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 04:08:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:31,792 INFO L93 Difference]: Finished difference Result 679 states and 791 transitions. [2022-11-03 04:08:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:08:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 104 [2022-11-03 04:08:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:31,794 INFO L225 Difference]: With dead ends: 679 [2022-11-03 04:08:31,794 INFO L226 Difference]: Without dead ends: 375 [2022-11-03 04:08:31,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:08:31,795 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 99 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:31,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 305 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 04:08:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-03 04:08:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 365. [2022-11-03 04:08:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.164835164835165) internal successors, (424), 364 states have internal predecessors, (424), 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 04:08:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 424 transitions. [2022-11-03 04:08:31,834 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 424 transitions. Word has length 104 [2022-11-03 04:08:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:31,834 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 424 transitions. [2022-11-03 04:08:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 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 04:08:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 424 transitions. [2022-11-03 04:08:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:31,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:31,836 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-03 04:08:31,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:32,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:32,049 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 899709249, now seen corresponding path program 2 times [2022-11-03 04:08:32,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050348866] [2022-11-03 04:08:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:32,050 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:32,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 04:08:32,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:32,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:08:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:32,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:33,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:33,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050348866] [2022-11-03 04:08:33,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050348866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364666808] [2022-11-03 04:08:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:33,269 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:33,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:33,270 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:33,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 04:08:33,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:33,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:08:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:34,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:34,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1364666808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170588476] [2022-11-03 04:08:34,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:34,250 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 04:08:34,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:34,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:08:34,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:34,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:35,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170588476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:35,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:35,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 14] total 27 [2022-11-03 04:08:35,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855907140] [2022-11-03 04:08:35,045 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:35,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 04:08:35,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 04:08:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 04:08:35,047 INFO L87 Difference]: Start difference. First operand 365 states and 424 transitions. Second operand has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 27 states have internal predecessors, (177), 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 04:08:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:36,310 INFO L93 Difference]: Finished difference Result 1399 states and 1627 transitions. [2022-11-03 04:08:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 04:08:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 27 states have internal predecessors, (177), 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 104 [2022-11-03 04:08:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:36,313 INFO L225 Difference]: With dead ends: 1399 [2022-11-03 04:08:36,313 INFO L226 Difference]: Without dead ends: 1101 [2022-11-03 04:08:36,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 596 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=418, Invalid=2888, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 04:08:36,314 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 268 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:36,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 2118 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 159 Unchecked, 0.1s Time] [2022-11-03 04:08:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-11-03 04:08:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 577. [2022-11-03 04:08:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.1701388888888888) internal successors, (674), 576 states have internal predecessors, (674), 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 04:08:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 674 transitions. [2022-11-03 04:08:36,362 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 674 transitions. Word has length 104 [2022-11-03 04:08:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:36,363 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 674 transitions. [2022-11-03 04:08:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 27 states have internal predecessors, (177), 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 04:08:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 674 transitions. [2022-11-03 04:08:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:08:36,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:36,365 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:36,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:36,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-03 04:08:36,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-03 04:08:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:36,984 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:08:36,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 198109375, now seen corresponding path program 2 times [2022-11-03 04:08:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:36,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982710665] [2022-11-03 04:08:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:36,986 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 04:08:37,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-03 04:08:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:42,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:50,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982710665] [2022-11-03 04:08:50,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982710665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418546154] [2022-11-03 04:08:50,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:50,631 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:50,632 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:50,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 04:08:51,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 04:08:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:52,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:53,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418546154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097088465] [2022-11-03 04:08:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:53,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:53,953 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:53,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0097f4c8-8e02-4822-9f12-d3ce76d9f30f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 04:08:54,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:54,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:54,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 04:08:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:09:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:06,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 10 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:17,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097088465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:17,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:17,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38, 38, 39, 39] total 117 [2022-11-03 04:09:17,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639381079] [2022-11-03 04:09:17,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-03 04:09:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-03 04:09:17,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=12902, Unknown=2, NotChecked=0, Total=13572 [2022-11-03 04:09:17,824 INFO L87 Difference]: Start difference. First operand 577 states and 674 transitions. Second operand has 117 states, 117 states have (on average 2.7264957264957266) internal successors, (319), 117 states have internal predecessors, (319), 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)