./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/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_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/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_b8a58c90-5e65-487c-b606-9e630c2bb884/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 4b628717e841a1f25041b262dec425d28d34a86158190aac9aa7a2c821c0add8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:36:35,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:36:35,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:36:35,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:36:35,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:36:35,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:36:35,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:36:35,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:36:35,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:36:35,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:36:35,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:36:35,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:36:35,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:36:35,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:36:35,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:36:35,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:36:35,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:36:35,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:36:35,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:36:35,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:36:35,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:36:35,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:36:35,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:36:35,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:36:35,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:36:35,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:36:35,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:36:35,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:36:35,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:36:35,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:36:35,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:36:35,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:36:35,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:36:35,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:36:35,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:36:35,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:36:35,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:36:35,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:36:35,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:36:35,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:36:35,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:36:35,186 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:36:35,235 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:36:35,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:36:35,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:36:35,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:36:35,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:36:35,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:36:35,238 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:36:35,238 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:36:35,238 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:36:35,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:36:35,240 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:36:35,240 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:36:35,240 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:36:35,240 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:36:35,241 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:36:35,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:36:35,241 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:36:35,241 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:36:35,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:36:35,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:36:35,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:36:35,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:36:35,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:36:35,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:36:35,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:36:35,244 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:36:35,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:36:35,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:36:35,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:36:35,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:35,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:36:35,245 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:36:35,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:36:35,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:36:35,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:36:35,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:36:35,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:36:35,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:36:35,247 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_b8a58c90-5e65-487c-b606-9e630c2bb884/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b628717e841a1f25041b262dec425d28d34a86158190aac9aa7a2c821c0add8 [2022-11-03 02:36:35,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:36:35,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:36:35,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:36:35,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:36:35,608 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:36:35,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:36:35,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b807ef025/9e2406000dc9450bbc7d2b96cfdbef48/FLAG1c04fe6f8 [2022-11-03 02:36:36,537 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:36:36,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:36:36,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b807ef025/9e2406000dc9450bbc7d2b96cfdbef48/FLAG1c04fe6f8 [2022-11-03 02:36:36,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b807ef025/9e2406000dc9450bbc7d2b96cfdbef48 [2022-11-03 02:36:36,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:36:36,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:36:36,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:36,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:36:36,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:36:36,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:36" (1/1) ... [2022-11-03 02:36:36,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d269ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:36, skipping insertion in model container [2022-11-03 02:36:36,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:36:36" (1/1) ... [2022-11-03 02:36:36,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:36:36,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:36:37,142 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_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c[1014,1027] [2022-11-03 02:36:37,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:37,801 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:36:37,815 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_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c[1014,1027] [2022-11-03 02:36:38,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:36:38,269 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:36:38,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38 WrapperNode [2022-11-03 02:36:38,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:36:38,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:38,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:36:38,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:36:38,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:38,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:38,898 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3382 [2022-11-03 02:36:38,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:36:38,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:36:38,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:36:38,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:36:38,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:38,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:36:39,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:36:39,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:36:39,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:36:39,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (1/1) ... [2022-11-03 02:36:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:36:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:39,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:36:39,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:36:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:36:39,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:36:40,416 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:36:40,419 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:58,105 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:21,041 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:21,042 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:43:21,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21 BoogieIcfgContainer [2022-11-03 02:43:21,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:21,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:21,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:21,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:21,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:36:36" (1/3) ... [2022-11-03 02:43:21,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d2e7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:21, skipping insertion in model container [2022-11-03 02:43:21,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:36:38" (2/3) ... [2022-11-03 02:43:21,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d2e7e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:21, skipping insertion in model container [2022-11-03 02:43:21,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21" (3/3) ... [2022-11-03 02:43:21,055 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:43:21,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:21,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:21,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:21,146 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;@322e62e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:21,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:43:21,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:21,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:43:21,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash 15811686, now seen corresponding path program 1 times [2022-11-03 02:43:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:43:21,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866114345] [2022-11-03 02:43:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:21,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:43:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:43:21,894 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:43:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:43:22,550 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:43:22,554 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:43:22,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:43:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:43:22,565 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:43:22,570 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:43:22,631 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:43:22,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:43:22 BoogieIcfgContainer [2022-11-03 02:43:22,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:43:22,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:43:22,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:43:22,670 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:43:22,672 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:21" (3/4) ... [2022-11-03 02:43:22,677 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:43:22,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:43:22,679 INFO L158 Benchmark]: Toolchain (without parser) took 406028.94ms. Allocated memory was 140.5MB in the beginning and 4.7GB in the end (delta: 4.6GB). Free memory was 102.9MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 2.7GB. Max. memory is 16.1GB. [2022-11-03 02:43:22,680 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 44.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:43:22,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1619.13ms. Allocated memory is still 140.5MB. Free memory was 102.6MB in the beginning and 89.6MB in the end (delta: 13.0MB). Peak memory consumption was 90.9MB. Max. memory is 16.1GB. [2022-11-03 02:43:22,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 626.90ms. Allocated memory was 140.5MB in the beginning and 232.8MB in the end (delta: 92.3MB). Free memory was 89.6MB in the beginning and 137.9MB in the end (delta: -48.4MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2022-11-03 02:43:22,689 INFO L158 Benchmark]: Boogie Preprocessor took 537.28ms. Allocated memory is still 232.8MB. Free memory was 137.9MB in the beginning and 99.9MB in the end (delta: 38.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-03 02:43:22,691 INFO L158 Benchmark]: RCFGBuilder took 401607.34ms. Allocated memory was 232.8MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 99.9MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 2.8GB. Max. memory is 16.1GB. [2022-11-03 02:43:22,692 INFO L158 Benchmark]: TraceAbstraction took 1619.69ms. Allocated memory is still 4.7GB. Free memory was 2.1GB in the beginning and 2.0GB in the end (delta: 123.7MB). Peak memory consumption was 123.7MB. Max. memory is 16.1GB. [2022-11-03 02:43:22,694 INFO L158 Benchmark]: Witness Printer took 7.65ms. Allocated memory is still 4.7GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:43:22,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 92.3MB. Free memory was 45.5MB in the beginning and 45.4MB in the end (delta: 44.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1619.13ms. Allocated memory is still 140.5MB. Free memory was 102.6MB in the beginning and 89.6MB in the end (delta: 13.0MB). Peak memory consumption was 90.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 626.90ms. Allocated memory was 140.5MB in the beginning and 232.8MB in the end (delta: 92.3MB). Free memory was 89.6MB in the beginning and 137.9MB in the end (delta: -48.4MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 537.28ms. Allocated memory is still 232.8MB. Free memory was 137.9MB in the beginning and 99.9MB in the end (delta: 38.0MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * RCFGBuilder took 401607.34ms. Allocated memory was 232.8MB in the beginning and 4.7GB in the end (delta: 4.5GB). Free memory was 99.9MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 2.8GB. Max. memory is 16.1GB. * TraceAbstraction took 1619.69ms. Allocated memory is still 4.7GB. Free memory was 2.1GB in the beginning and 2.0GB in the end (delta: 123.7MB). Peak memory consumption was 123.7MB. Max. memory is 16.1GB. * Witness Printer took 7.65ms. Allocated memory is still 4.7GB. Free memory was 2.0GB in the beginning and 2.0GB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. 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 378, overapproximation of bitwiseAnd at line 267. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 8); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (8 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 24); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (24 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_2 var_5 = 0; [L38] const SORT_1 var_26 = 0; [L39] const SORT_4 var_109 = 1; [L40] const SORT_4 var_110 = 0; [L41] const SORT_2 var_121 = 0; [L42] const SORT_2 var_122 = 255; [L43] const SORT_2 var_136 = 1; [L44] const SORT_2 var_161 = 2; [L45] const SORT_2 var_180 = 3; [L46] const SORT_3 var_225 = 0; [L47] const SORT_4 var_442 = 4; [L48] const SORT_2 var_455 = 4; [L50] SORT_1 input_125; [L51] SORT_1 input_127; [L52] SORT_1 input_129; [L53] SORT_1 input_131; [L54] SORT_1 input_132; [L55] SORT_1 input_133; [L56] SORT_1 input_135; [L57] SORT_1 input_148; [L58] SORT_1 input_149; [L59] SORT_1 input_151; [L60] SORT_1 input_164; [L61] SORT_1 input_165; [L62] SORT_1 input_167; [L63] SORT_1 input_178; [L64] SORT_1 input_179; [L65] SORT_1 input_183; [L66] SORT_1 input_195; [L67] SORT_1 input_196; [L68] SORT_1 input_197; [L69] SORT_1 input_198; [L70] SORT_1 input_205; [L71] SORT_1 input_206; [L72] SORT_1 input_207; [L73] SORT_1 input_208; [L74] SORT_1 input_209; [L75] SORT_1 input_210; [L76] SORT_1 input_211; [L77] SORT_1 input_212; [L78] SORT_1 input_224; [L79] SORT_1 input_232; [L80] SORT_1 input_239; [L81] SORT_1 input_246; [L82] SORT_1 input_254; [L83] SORT_1 input_256; [L84] SORT_1 input_260; [L85] SORT_1 input_262; [L86] SORT_1 input_271; [L87] SORT_1 input_285; [L88] SORT_1 input_296; [L89] SORT_1 input_298; [L90] SORT_1 input_302; [L91] SORT_1 input_304; [L92] SORT_1 input_313; [L93] SORT_1 input_327; [L94] SORT_1 input_338; [L95] SORT_1 input_340; [L96] SORT_1 input_344; [L97] SORT_1 input_346; [L98] SORT_1 input_355; [L99] SORT_1 input_369; [L100] SORT_1 input_380; [L101] SORT_1 input_382; [L102] SORT_1 input_386; [L103] SORT_1 input_388; [L104] SORT_1 input_397; [L105] SORT_1 input_411; [L107] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L108] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L109] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L110] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L111] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L112] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L113] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L114] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L115] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L116] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L117] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_33 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_35 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_37 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L124] SORT_1 state_41 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 state_43 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L126] SORT_1 state_45 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L127] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L128] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L129] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L130] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L131] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L132] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L133] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L134] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L135] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L136] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L137] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L138] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L139] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L140] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L141] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L142] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L143] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L144] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L145] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L146] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L147] SORT_1 state_87 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L148] SORT_1 state_89 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L149] SORT_1 state_91 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L150] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L151] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L152] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L153] SORT_1 state_99 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L154] SORT_1 state_101 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L155] SORT_1 state_103 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L156] SORT_1 state_105 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L157] SORT_1 state_107 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L159] SORT_2 init_7_arg_1 = var_5; [L160] state_6 = init_7_arg_1 [L161] SORT_2 init_9_arg_1 = var_5; [L162] state_8 = init_9_arg_1 [L163] SORT_2 init_11_arg_1 = var_5; [L164] state_10 = init_11_arg_1 [L165] SORT_2 init_13_arg_1 = var_5; [L166] state_12 = init_13_arg_1 [L167] SORT_2 init_15_arg_1 = var_5; [L168] state_14 = init_15_arg_1 [L169] SORT_2 init_17_arg_1 = var_5; [L170] state_16 = init_17_arg_1 [L171] SORT_2 init_19_arg_1 = var_5; [L172] state_18 = init_19_arg_1 [L173] SORT_2 init_21_arg_1 = var_5; [L174] state_20 = init_21_arg_1 [L175] SORT_2 init_23_arg_1 = var_5; [L176] state_22 = init_23_arg_1 [L177] SORT_2 init_25_arg_1 = var_5; [L178] state_24 = init_25_arg_1 [L179] SORT_1 init_28_arg_1 = var_26; [L180] state_27 = init_28_arg_1 [L181] SORT_1 init_30_arg_1 = var_26; [L182] state_29 = init_30_arg_1 [L183] SORT_1 init_32_arg_1 = var_26; [L184] state_31 = init_32_arg_1 [L185] SORT_1 init_34_arg_1 = var_26; [L186] state_33 = init_34_arg_1 [L187] SORT_1 init_36_arg_1 = var_26; [L188] state_35 = init_36_arg_1 [L189] SORT_1 init_38_arg_1 = var_26; [L190] state_37 = init_38_arg_1 [L191] SORT_1 init_40_arg_1 = var_26; [L192] state_39 = init_40_arg_1 [L193] SORT_1 init_42_arg_1 = var_26; [L194] state_41 = init_42_arg_1 [L195] SORT_1 init_44_arg_1 = var_26; [L196] state_43 = init_44_arg_1 [L197] SORT_1 init_46_arg_1 = var_26; [L198] state_45 = init_46_arg_1 [L199] SORT_1 init_48_arg_1 = var_26; [L200] state_47 = init_48_arg_1 [L201] SORT_1 init_50_arg_1 = var_26; [L202] state_49 = init_50_arg_1 [L203] SORT_1 init_52_arg_1 = var_26; [L204] state_51 = init_52_arg_1 [L205] SORT_1 init_54_arg_1 = var_26; [L206] state_53 = init_54_arg_1 [L207] SORT_1 init_56_arg_1 = var_26; [L208] state_55 = init_56_arg_1 [L209] SORT_1 init_58_arg_1 = var_26; [L210] state_57 = init_58_arg_1 [L211] SORT_1 init_60_arg_1 = var_26; [L212] state_59 = init_60_arg_1 [L213] SORT_1 init_62_arg_1 = var_26; [L214] state_61 = init_62_arg_1 [L215] SORT_1 init_64_arg_1 = var_26; [L216] state_63 = init_64_arg_1 [L217] SORT_1 init_66_arg_1 = var_26; [L218] state_65 = init_66_arg_1 [L219] SORT_1 init_68_arg_1 = var_26; [L220] state_67 = init_68_arg_1 [L221] SORT_1 init_70_arg_1 = var_26; [L222] state_69 = init_70_arg_1 [L223] SORT_1 init_72_arg_1 = var_26; [L224] state_71 = init_72_arg_1 [L225] SORT_1 init_74_arg_1 = var_26; [L226] state_73 = init_74_arg_1 [L227] SORT_1 init_76_arg_1 = var_26; [L228] state_75 = init_76_arg_1 [L229] SORT_1 init_78_arg_1 = var_26; [L230] state_77 = init_78_arg_1 [L231] SORT_1 init_80_arg_1 = var_26; [L232] state_79 = init_80_arg_1 [L233] SORT_1 init_82_arg_1 = var_26; [L234] state_81 = init_82_arg_1 [L235] SORT_1 init_84_arg_1 = var_26; [L236] state_83 = init_84_arg_1 [L237] SORT_1 init_86_arg_1 = var_26; [L238] state_85 = init_86_arg_1 [L239] SORT_1 init_88_arg_1 = var_26; [L240] state_87 = init_88_arg_1 [L241] SORT_1 init_90_arg_1 = var_26; [L242] state_89 = init_90_arg_1 [L243] SORT_1 init_92_arg_1 = var_26; [L244] state_91 = init_92_arg_1 [L245] SORT_1 init_94_arg_1 = var_26; [L246] state_93 = init_94_arg_1 [L247] SORT_1 init_96_arg_1 = var_26; [L248] state_95 = init_96_arg_1 [L249] SORT_1 init_98_arg_1 = var_26; [L250] state_97 = init_98_arg_1 [L251] SORT_1 init_100_arg_1 = var_26; [L252] state_99 = init_100_arg_1 [L253] SORT_1 init_102_arg_1 = var_26; [L254] state_101 = init_102_arg_1 [L255] SORT_1 init_104_arg_1 = var_26; [L256] state_103 = init_104_arg_1 [L257] SORT_1 init_106_arg_1 = var_26; [L258] state_105 = init_106_arg_1 [L259] SORT_1 init_108_arg_1 = var_26; [L260] state_107 = init_108_arg_1 VAL [init_100_arg_1=0, init_102_arg_1=0, init_104_arg_1=0, init_106_arg_1=0, init_108_arg_1=0, init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=0, init_34_arg_1=0, init_36_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_42_arg_1=0, init_44_arg_1=0, init_46_arg_1=0, init_48_arg_1=0, init_50_arg_1=0, init_52_arg_1=0, init_54_arg_1=0, init_56_arg_1=0, init_58_arg_1=0, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_68_arg_1=0, init_70_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_76_arg_1=0, init_78_arg_1=0, init_7_arg_1=0, init_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_86_arg_1=0, init_88_arg_1=0, init_90_arg_1=0, init_92_arg_1=0, init_94_arg_1=0, init_96_arg_1=0, init_98_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=255, mask_SORT_3=4294967295, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=128, msb_SORT_3=8388608, msb_SORT_4=2147483648, state_10=0, state_101=0, state_103=0, state_105=0, state_107=0, state_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_27=0, state_29=0, state_31=0, state_33=0, state_35=0, state_37=0, state_39=0, state_41=0, state_43=0, state_45=0, state_47=0, state_49=0, state_51=0, state_53=0, state_55=0, state_57=0, state_59=0, state_6=0, state_61=0, state_63=0, state_65=0, state_67=0, state_69=0, state_71=0, state_73=0, state_75=0, state_77=0, state_79=0, state_8=0, state_81=0, state_83=0, state_85=0, state_87=0, state_89=0, state_91=0, state_93=0, state_95=0, state_97=0, state_99=0, var_109=1, var_110=0, var_121=0, var_122=255, var_136=1, var_161=2, var_180=3, var_225=0, var_26=0, var_442=4, var_455=4, var_5=0] [L263] input_125 = __VERIFIER_nondet_uchar() [L264] input_127 = __VERIFIER_nondet_uchar() [L265] input_129 = __VERIFIER_nondet_uchar() [L266] input_131 = __VERIFIER_nondet_uchar() [L267] input_131 = input_131 & mask_SORT_1 [L268] input_132 = __VERIFIER_nondet_uchar() [L269] input_132 = input_132 & mask_SORT_1 [L270] input_133 = __VERIFIER_nondet_uchar() [L271] input_135 = __VERIFIER_nondet_uchar() [L272] input_135 = input_135 & mask_SORT_1 [L273] input_148 = __VERIFIER_nondet_uchar() [L274] input_148 = input_148 & mask_SORT_1 [L275] input_149 = __VERIFIER_nondet_uchar() [L276] input_149 = input_149 & mask_SORT_1 [L277] input_151 = __VERIFIER_nondet_uchar() [L278] input_151 = input_151 & mask_SORT_1 [L279] input_164 = __VERIFIER_nondet_uchar() [L280] input_164 = input_164 & mask_SORT_1 [L281] input_165 = __VERIFIER_nondet_uchar() [L282] input_165 = input_165 & mask_SORT_1 [L283] input_167 = __VERIFIER_nondet_uchar() [L284] input_167 = input_167 & mask_SORT_1 [L285] input_178 = __VERIFIER_nondet_uchar() [L286] input_178 = input_178 & mask_SORT_1 [L287] input_179 = __VERIFIER_nondet_uchar() [L288] input_179 = input_179 & mask_SORT_1 [L289] input_183 = __VERIFIER_nondet_uchar() [L290] input_183 = input_183 & mask_SORT_1 [L291] input_195 = __VERIFIER_nondet_uchar() [L292] input_195 = input_195 & mask_SORT_1 [L293] input_196 = __VERIFIER_nondet_uchar() [L294] input_196 = input_196 & mask_SORT_1 [L295] input_197 = __VERIFIER_nondet_uchar() [L296] input_197 = input_197 & mask_SORT_1 [L297] input_198 = __VERIFIER_nondet_uchar() [L298] input_198 = input_198 & mask_SORT_1 [L299] input_205 = __VERIFIER_nondet_uchar() [L300] input_205 = input_205 & mask_SORT_1 [L301] input_206 = __VERIFIER_nondet_uchar() [L302] input_206 = input_206 & mask_SORT_1 [L303] input_207 = __VERIFIER_nondet_uchar() [L304] input_207 = input_207 & mask_SORT_1 [L305] input_208 = __VERIFIER_nondet_uchar() [L306] input_208 = input_208 & mask_SORT_1 [L307] input_209 = __VERIFIER_nondet_uchar() [L308] input_209 = input_209 & mask_SORT_1 [L309] input_210 = __VERIFIER_nondet_uchar() [L310] input_210 = input_210 & mask_SORT_1 [L311] input_211 = __VERIFIER_nondet_uchar() [L312] input_211 = input_211 & mask_SORT_1 [L313] input_212 = __VERIFIER_nondet_uchar() [L314] input_212 = input_212 & mask_SORT_1 [L315] input_224 = __VERIFIER_nondet_uchar() [L316] input_224 = input_224 & mask_SORT_1 [L317] input_232 = __VERIFIER_nondet_uchar() [L318] input_232 = input_232 & mask_SORT_1 [L319] input_239 = __VERIFIER_nondet_uchar() [L320] input_239 = input_239 & mask_SORT_1 [L321] input_246 = __VERIFIER_nondet_uchar() [L322] input_246 = input_246 & mask_SORT_1 [L323] input_254 = __VERIFIER_nondet_uchar() [L324] input_256 = __VERIFIER_nondet_uchar() [L325] input_260 = __VERIFIER_nondet_uchar() [L326] input_262 = __VERIFIER_nondet_uchar() [L327] input_271 = __VERIFIER_nondet_uchar() [L328] input_285 = __VERIFIER_nondet_uchar() [L329] input_296 = __VERIFIER_nondet_uchar() [L330] input_298 = __VERIFIER_nondet_uchar() [L331] input_302 = __VERIFIER_nondet_uchar() [L332] input_304 = __VERIFIER_nondet_uchar() [L333] input_313 = __VERIFIER_nondet_uchar() [L334] input_327 = __VERIFIER_nondet_uchar() [L335] input_338 = __VERIFIER_nondet_uchar() [L336] input_340 = __VERIFIER_nondet_uchar() [L337] input_344 = __VERIFIER_nondet_uchar() [L338] input_346 = __VERIFIER_nondet_uchar() [L339] input_355 = __VERIFIER_nondet_uchar() [L340] input_369 = __VERIFIER_nondet_uchar() [L341] input_380 = __VERIFIER_nondet_uchar() [L342] input_382 = __VERIFIER_nondet_uchar() [L343] input_386 = __VERIFIER_nondet_uchar() [L344] input_388 = __VERIFIER_nondet_uchar() [L345] input_397 = __VERIFIER_nondet_uchar() [L346] input_411 = __VERIFIER_nondet_uchar() [L349] SORT_1 var_111_arg_0 = state_29; [L350] SORT_4 var_111_arg_1 = var_109; [L351] SORT_4 var_111_arg_2 = var_110; [L352] EXPR var_111_arg_0 ? var_111_arg_1 : var_111_arg_2 [L352] SORT_4 var_111 = var_111_arg_0 ? var_111_arg_1 : var_111_arg_2; [L353] SORT_1 var_112_arg_0 = state_49; [L354] SORT_4 var_112_arg_1 = var_109; [L355] SORT_4 var_112_arg_2 = var_110; [L356] EXPR var_112_arg_0 ? var_112_arg_1 : var_112_arg_2 [L356] SORT_4 var_112 = var_112_arg_0 ? var_112_arg_1 : var_112_arg_2; [L357] SORT_4 var_113_arg_0 = var_111; [L358] SORT_4 var_113_arg_1 = var_112; [L359] SORT_4 var_113 = var_113_arg_0 + var_113_arg_1; [L360] SORT_1 var_114_arg_0 = state_69; [L361] SORT_4 var_114_arg_1 = var_109; [L362] SORT_4 var_114_arg_2 = var_110; [L363] EXPR var_114_arg_0 ? var_114_arg_1 : var_114_arg_2 [L363] SORT_4 var_114 = var_114_arg_0 ? var_114_arg_1 : var_114_arg_2; [L364] SORT_4 var_115_arg_0 = var_113; [L365] SORT_4 var_115_arg_1 = var_114; [L366] SORT_4 var_115 = var_115_arg_0 + var_115_arg_1; [L367] SORT_1 var_116_arg_0 = state_89; [L368] SORT_4 var_116_arg_1 = var_109; [L369] SORT_4 var_116_arg_2 = var_110; [L370] EXPR var_116_arg_0 ? var_116_arg_1 : var_116_arg_2 [L370] SORT_4 var_116 = var_116_arg_0 ? var_116_arg_1 : var_116_arg_2; [L371] SORT_4 var_117_arg_0 = var_115; [L372] SORT_4 var_117_arg_1 = var_116; [L373] SORT_4 var_117 = var_117_arg_0 + var_117_arg_1; [L374] var_117 = var_117 & mask_SORT_4 [L375] SORT_4 var_118_arg_0 = var_117; [L376] SORT_4 var_118_arg_1 = var_109; [L377] SORT_1 var_118 = var_118_arg_0 <= var_118_arg_1; [L378] SORT_1 var_119_arg_0 = ~state_107; [L379] var_119_arg_0 = var_119_arg_0 & mask_SORT_1 [L380] SORT_1 var_119_arg_1 = ~var_118; [L381] var_119_arg_1 = var_119_arg_1 & mask_SORT_1 [L382] SORT_1 var_119 = var_119_arg_0 & var_119_arg_1; [L383] var_119 = var_119 & mask_SORT_1 [L384] SORT_1 bad_120_arg_0 = var_119; [L385] CALL __VERIFIER_assert(!(bad_120_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:43:22,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/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_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/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_b8a58c90-5e65-487c-b606-9e630c2bb884/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 4b628717e841a1f25041b262dec425d28d34a86158190aac9aa7a2c821c0add8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:43:25,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:43:25,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:43:25,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:43:25,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:43:25,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:43:25,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:43:25,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:43:25,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:43:25,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:43:25,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:43:25,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:43:25,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:43:25,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:43:25,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:43:25,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:43:25,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:43:25,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:43:25,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:43:25,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:43:25,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:43:25,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:43:25,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:43:25,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:43:25,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:43:25,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:43:25,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:43:25,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:43:25,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:43:25,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:43:25,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:43:25,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:43:25,725 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:43:25,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:43:25,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:43:25,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:43:25,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:43:25,729 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:43:25,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:43:25,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:43:25,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:43:25,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:43:25,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:43:25,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:43:25,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:43:25,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:43:25,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:43:25,782 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:43:25,782 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:43:25,782 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:43:25,782 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:43:25,783 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:43:25,783 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:43:25,783 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:43:25,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:43:25,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:43:25,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:43:25,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:43:25,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:43:25,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:43:25,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:43:25,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:43:25,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:43:25,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:43:25,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:43:25,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:43:25,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:43:25,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:43:25,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:25,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:43:25,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:43:25,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:43:25,789 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:43:25,789 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:25,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:43:25,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:43:25,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:43:25,790 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_b8a58c90-5e65-487c-b606-9e630c2bb884/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b628717e841a1f25041b262dec425d28d34a86158190aac9aa7a2c821c0add8 [2022-11-03 02:43:26,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:43:26,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:43:26,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:43:26,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:43:26,229 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:43:26,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:43:26,325 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b21061078/6939d380c70d4313a78d650927f88dd7/FLAG3e6f7d432 [2022-11-03 02:43:27,240 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:43:27,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:43:27,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b21061078/6939d380c70d4313a78d650927f88dd7/FLAG3e6f7d432 [2022-11-03 02:43:27,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/data/b21061078/6939d380c70d4313a78d650927f88dd7 [2022-11-03 02:43:27,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:43:27,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:43:27,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:27,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:43:27,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:43:27,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:27" (1/1) ... [2022-11-03 02:43:27,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b37c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:27, skipping insertion in model container [2022-11-03 02:43:27,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:43:27" (1/1) ... [2022-11-03 02:43:27,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:43:27,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:43:27,804 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_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c[1014,1027] [2022-11-03 02:43:28,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:28,383 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:43:28,396 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_b8a58c90-5e65-487c-b606-9e630c2bb884/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.lamport.6.prop1-func-interl.c[1014,1027] [2022-11-03 02:43:28,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:43:28,652 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:43:28,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28 WrapperNode [2022-11-03 02:43:28,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:43:28,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:28,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:43:28,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:43:28,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:28,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:28,940 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3382 [2022-11-03 02:43:28,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:43:28,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:43:28,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:43:28,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:43:28,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:28,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:28,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:28,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:43:29,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:43:29,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:43:29,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:43:29,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (1/1) ... [2022-11-03 02:43:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:43:29,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:29,178 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:43:29,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:43:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:43:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:43:29,905 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:43:29,907 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:43:33,660 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:43:33,670 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:43:33,671 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:43:33,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:33 BoogieIcfgContainer [2022-11-03 02:43:33,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:43:33,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:43:33,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:43:33,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:43:33,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:43:27" (1/3) ... [2022-11-03 02:43:33,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d6a204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:33, skipping insertion in model container [2022-11-03 02:43:33,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:43:28" (2/3) ... [2022-11-03 02:43:33,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d6a204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:43:33, skipping insertion in model container [2022-11-03 02:43:33,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:43:33" (3/3) ... [2022-11-03 02:43:33,684 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.lamport.6.prop1-func-interl.c [2022-11-03 02:43:33,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:43:33,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:43:33,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:43:33,808 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;@2a45873, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:43:33,808 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:43:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 138 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:43:33,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:33,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:33,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1165686489, now seen corresponding path program 1 times [2022-11-03 02:43:33,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723136499] [2022-11-03 02:43:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:33,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:43:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:43:34,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:34,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:34,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723136499] [2022-11-03 02:43:34,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723136499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:34,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:34,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:34,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745813075] [2022-11-03 02:43:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:34,840 INFO L87 Difference]: Start difference. First operand has 139 states, 137 states have (on average 1.4963503649635037) internal successors, (205), 138 states have internal predecessors, (205), 0 states have call successors, (0), 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 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:35,377 INFO L93 Difference]: Finished difference Result 537 states and 803 transitions. [2022-11-03 02:43:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:35,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-03 02:43:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:35,397 INFO L225 Difference]: With dead ends: 537 [2022-11-03 02:43:35,398 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 02:43:35,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:35,406 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 583 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:35,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 775 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:43:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 02:43:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 137. [2022-11-03 02:43:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 201 transitions. [2022-11-03 02:43:35,502 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 201 transitions. Word has length 13 [2022-11-03 02:43:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:35,503 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 201 transitions. [2022-11-03 02:43:35,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 201 transitions. [2022-11-03 02:43:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:43:35,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:35,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:35,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:35,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:35,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash 772659479, now seen corresponding path program 1 times [2022-11-03 02:43:35,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988396675] [2022-11-03 02:43:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:35,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:35,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:35,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:43:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:43:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:36,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:36,582 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:36,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988396675] [2022-11-03 02:43:36,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988396675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:36,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:36,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603970308] [2022-11-03 02:43:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:36,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:36,595 INFO L87 Difference]: Start difference. First operand 137 states and 201 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:37,020 INFO L93 Difference]: Finished difference Result 533 states and 787 transitions. [2022-11-03 02:43:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-03 02:43:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:37,025 INFO L225 Difference]: With dead ends: 533 [2022-11-03 02:43:37,025 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 02:43:37,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:37,028 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 577 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:37,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 774 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:43:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 02:43:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 139. [2022-11-03 02:43:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.4710144927536233) internal successors, (203), 138 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:37,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2022-11-03 02:43:37,039 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 13 [2022-11-03 02:43:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:37,039 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2022-11-03 02:43:37,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2022-11-03 02:43:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:43:37,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:37,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:37,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -36687147, now seen corresponding path program 1 times [2022-11-03 02:43:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:37,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583407041] [2022-11-03 02:43:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:37,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:37,259 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:37,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:43:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:43:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:38,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:38,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:38,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583407041] [2022-11-03 02:43:38,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583407041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:38,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:38,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:38,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056530394] [2022-11-03 02:43:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:38,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:38,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:38,041 INFO L87 Difference]: Start difference. First operand 139 states and 203 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:38,416 INFO L93 Difference]: Finished difference Result 533 states and 786 transitions. [2022-11-03 02:43:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:38,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-03 02:43:38,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:38,421 INFO L225 Difference]: With dead ends: 533 [2022-11-03 02:43:38,421 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 02:43:38,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:38,425 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 571 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:38,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 773 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:43:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 02:43:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 141. [2022-11-03 02:43:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4642857142857142) internal successors, (205), 140 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2022-11-03 02:43:38,445 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 13 [2022-11-03 02:43:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:38,446 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2022-11-03 02:43:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2022-11-03 02:43:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:43:38,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:38,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:38,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:38,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 20571155, now seen corresponding path program 1 times [2022-11-03 02:43:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:38,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796107480] [2022-11-03 02:43:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:38,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:38,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:43:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:43:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:39,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:39,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:39,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796107480] [2022-11-03 02:43:39,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796107480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:39,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:39,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:43:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320339826] [2022-11-03 02:43:39,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:43:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:39,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:43:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:43:39,368 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:39,711 INFO L93 Difference]: Finished difference Result 533 states and 785 transitions. [2022-11-03 02:43:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:43:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-03 02:43:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:39,719 INFO L225 Difference]: With dead ends: 533 [2022-11-03 02:43:39,719 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 02:43:39,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:39,723 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 565 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:39,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 775 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:43:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 02:43:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 143. [2022-11-03 02:43:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4577464788732395) internal successors, (207), 142 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 207 transitions. [2022-11-03 02:43:39,736 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 207 transitions. Word has length 13 [2022-11-03 02:43:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:39,737 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 207 transitions. [2022-11-03 02:43:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 207 transitions. [2022-11-03 02:43:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:43:39,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:39,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:39,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:39,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:39,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash 20630737, now seen corresponding path program 1 times [2022-11-03 02:43:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:39,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472361997] [2022-11-03 02:43:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:39,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:39,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:39,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:39,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:43:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:43:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:40,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:40,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:40,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472361997] [2022-11-03 02:43:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472361997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:40,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:43:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407572522] [2022-11-03 02:43:40,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:43:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:43:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:43:40,997 INFO L87 Difference]: Start difference. First operand 143 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:44,544 INFO L93 Difference]: Finished difference Result 709 states and 1039 transitions. [2022-11-03 02:43:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:43:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-03 02:43:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:44,548 INFO L225 Difference]: With dead ends: 709 [2022-11-03 02:43:44,548 INFO L226 Difference]: Without dead ends: 707 [2022-11-03 02:43:44,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:43:44,550 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1933 mSDsluCounter, 2571 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:44,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1933 Valid, 2769 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-03 02:43:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-03 02:43:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 151. [2022-11-03 02:43:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4533333333333334) internal successors, (218), 150 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2022-11-03 02:43:44,569 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 13 [2022-11-03 02:43:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:44,569 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2022-11-03 02:43:44,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2022-11-03 02:43:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:44,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:44,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:44,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:44,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 219624265, now seen corresponding path program 1 times [2022-11-03 02:43:44,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:44,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233010137] [2022-11-03 02:43:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:44,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:44,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:44,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:43:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:46,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:46,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233010137] [2022-11-03 02:43:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233010137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:46,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:46,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:46,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551512725] [2022-11-03 02:43:46,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:46,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:46,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:46,681 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:47,461 INFO L93 Difference]: Finished difference Result 576 states and 843 transitions. [2022-11-03 02:43:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:47,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:43:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:47,470 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:43:47,470 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:43:47,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:47,471 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 758 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:47,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1040 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:43:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:43:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 157. [2022-11-03 02:43:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4423076923076923) internal successors, (225), 156 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 225 transitions. [2022-11-03 02:43:47,481 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 225 transitions. Word has length 144 [2022-11-03 02:43:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:47,481 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 225 transitions. [2022-11-03 02:43:47,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 225 transitions. [2022-11-03 02:43:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:47,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:47,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:47,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:47,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:47,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -728427701, now seen corresponding path program 1 times [2022-11-03 02:43:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882401886] [2022-11-03 02:43:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:47,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:47,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:47,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:47,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:43:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:49,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:49,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882401886] [2022-11-03 02:43:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882401886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:49,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:49,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869277986] [2022-11-03 02:43:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:49,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:49,579 INFO L87 Difference]: Start difference. First operand 157 states and 225 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:50,406 INFO L93 Difference]: Finished difference Result 576 states and 842 transitions. [2022-11-03 02:43:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:43:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:50,411 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:43:50,411 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:43:50,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:50,413 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 736 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:50,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1027 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:43:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:43:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 165. [2022-11-03 02:43:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.4390243902439024) internal successors, (236), 164 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2022-11-03 02:43:50,425 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 144 [2022-11-03 02:43:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:50,425 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2022-11-03 02:43:50,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2022-11-03 02:43:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:50,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:50,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:50,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:50,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:50,653 INFO L85 PathProgramCache]: Analyzing trace with hash -240380595, now seen corresponding path program 1 times [2022-11-03 02:43:50,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:50,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184573867] [2022-11-03 02:43:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:50,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:50,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:50,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:43:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:52,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:52,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:52,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:52,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184573867] [2022-11-03 02:43:52,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184573867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:52,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:52,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308309255] [2022-11-03 02:43:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:52,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:52,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:52,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:52,500 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:53,276 INFO L93 Difference]: Finished difference Result 576 states and 841 transitions. [2022-11-03 02:43:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:43:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:53,280 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:43:53,280 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:43:53,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:53,282 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 729 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:53,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1023 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:43:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:43:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 167. [2022-11-03 02:43:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.4337349397590362) internal successors, (238), 166 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 238 transitions. [2022-11-03 02:43:53,291 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 238 transitions. Word has length 144 [2022-11-03 02:43:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:53,291 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 238 transitions. [2022-11-03 02:43:53,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 238 transitions. [2022-11-03 02:43:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:53,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:53,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:53,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:53,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:53,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1522552881, now seen corresponding path program 1 times [2022-11-03 02:43:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938616321] [2022-11-03 02:43:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:53,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:53,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:53,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:53,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:43:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:54,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:54,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:55,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:55,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:55,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938616321] [2022-11-03 02:43:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938616321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:55,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:43:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920366576] [2022-11-03 02:43:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:43:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:43:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:43:55,298 INFO L87 Difference]: Start difference. First operand 167 states and 238 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:56,127 INFO L93 Difference]: Finished difference Result 576 states and 840 transitions. [2022-11-03 02:43:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:43:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:43:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:56,130 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:43:56,131 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:43:56,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:43:56,132 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 721 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:56,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1038 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:43:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:43:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 169. [2022-11-03 02:43:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.4285714285714286) internal successors, (240), 168 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 240 transitions. [2022-11-03 02:43:56,142 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 240 transitions. Word has length 144 [2022-11-03 02:43:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:56,143 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 240 transitions. [2022-11-03 02:43:56,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:43:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 240 transitions. [2022-11-03 02:43:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:56,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:56,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:56,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-03 02:43:56,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:56,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1050411729, now seen corresponding path program 1 times [2022-11-03 02:43:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:56,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442428951] [2022-11-03 02:43:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:56,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:56,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:43:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:43:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:43:58,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:43:58,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442428951] [2022-11-03 02:43:58,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442428951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:43:58,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:43:58,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:43:58,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711248583] [2022-11-03 02:43:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:43:58,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:43:58,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:43:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:43:58,024 INFO L87 Difference]: Start difference. First operand 169 states and 240 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:43:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:58,925 INFO L93 Difference]: Finished difference Result 590 states and 860 transitions. [2022-11-03 02:43:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:43:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:43:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:58,934 INFO L225 Difference]: With dead ends: 590 [2022-11-03 02:43:58,934 INFO L226 Difference]: Without dead ends: 449 [2022-11-03 02:43:58,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:43:58,936 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 923 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:58,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1411 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:43:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-03 02:43:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 173. [2022-11-03 02:43:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4244186046511629) internal successors, (245), 172 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 245 transitions. [2022-11-03 02:43:58,963 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 245 transitions. Word has length 144 [2022-11-03 02:43:58,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:58,964 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 245 transitions. [2022-11-03 02:43:58,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:43:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 245 transitions. [2022-11-03 02:43:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:43:58,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:58,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:43:58,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:43:59,167 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:59,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1517410605, now seen corresponding path program 1 times [2022-11-03 02:43:59,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:59,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105507292] [2022-11-03 02:43:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:59,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:44:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:00,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:00,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:00,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:00,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:00,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105507292] [2022-11-03 02:44:00,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105507292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:00,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:00,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050119147] [2022-11-03 02:44:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:00,916 INFO L87 Difference]: Start difference. First operand 173 states and 245 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:01,892 INFO L93 Difference]: Finished difference Result 590 states and 859 transitions. [2022-11-03 02:44:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:01,896 INFO L225 Difference]: With dead ends: 590 [2022-11-03 02:44:01,896 INFO L226 Difference]: Without dead ends: 449 [2022-11-03 02:44:01,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:01,898 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 905 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:01,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 1392 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:44:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-03 02:44:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 179. [2022-11-03 02:44:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4213483146067416) internal successors, (253), 178 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 253 transitions. [2022-11-03 02:44:01,908 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 253 transitions. Word has length 144 [2022-11-03 02:44:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:01,909 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 253 transitions. [2022-11-03 02:44:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 253 transitions. [2022-11-03 02:44:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:01,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:01,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:01,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:02,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:02,129 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash 635696213, now seen corresponding path program 1 times [2022-11-03 02:44:02,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:02,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914369964] [2022-11-03 02:44:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:02,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:02,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:44:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:03,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:03,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:03,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914369964] [2022-11-03 02:44:03,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914369964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:03,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:03,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:03,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885223745] [2022-11-03 02:44:03,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:03,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:03,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:03,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:03,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:03,869 INFO L87 Difference]: Start difference. First operand 179 states and 253 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:04,792 INFO L93 Difference]: Finished difference Result 576 states and 837 transitions. [2022-11-03 02:44:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:44:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:04,795 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:44:04,796 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:44:04,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:04,797 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 680 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:04,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1030 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:44:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:44:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 183. [2022-11-03 02:44:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.4175824175824177) internal successors, (258), 182 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 258 transitions. [2022-11-03 02:44:04,808 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 258 transitions. Word has length 144 [2022-11-03 02:44:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:04,808 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 258 transitions. [2022-11-03 02:44:04,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 258 transitions. [2022-11-03 02:44:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:04,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:04,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:04,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:05,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:05,032 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:05,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1397697833, now seen corresponding path program 1 times [2022-11-03 02:44:05,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:05,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668722672] [2022-11-03 02:44:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:05,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:05,038 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:05,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:44:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:06,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:06,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:06,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668722672] [2022-11-03 02:44:06,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668722672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:06,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:06,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094235400] [2022-11-03 02:44:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:06,782 INFO L87 Difference]: Start difference. First operand 183 states and 258 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:07,647 INFO L93 Difference]: Finished difference Result 604 states and 878 transitions. [2022-11-03 02:44:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:07,652 INFO L225 Difference]: With dead ends: 604 [2022-11-03 02:44:07,652 INFO L226 Difference]: Without dead ends: 463 [2022-11-03 02:44:07,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:07,653 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 908 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:07,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1407 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:44:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-03 02:44:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 185. [2022-11-03 02:44:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.4130434782608696) internal successors, (260), 184 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 260 transitions. [2022-11-03 02:44:07,684 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 260 transitions. Word has length 144 [2022-11-03 02:44:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:07,684 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 260 transitions. [2022-11-03 02:44:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:07,685 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 260 transitions. [2022-11-03 02:44:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:07,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:07,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:07,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:07,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1590127065, now seen corresponding path program 1 times [2022-11-03 02:44:07,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:07,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791851] [2022-11-03 02:44:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:07,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:07,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:07,900 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:07,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:44:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:09,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:09,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791851] [2022-11-03 02:44:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:09,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:09,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812430064] [2022-11-03 02:44:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:09,740 INFO L87 Difference]: Start difference. First operand 185 states and 260 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:10,543 INFO L93 Difference]: Finished difference Result 604 states and 877 transitions. [2022-11-03 02:44:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:10,546 INFO L225 Difference]: With dead ends: 604 [2022-11-03 02:44:10,546 INFO L226 Difference]: Without dead ends: 463 [2022-11-03 02:44:10,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:10,547 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 895 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:10,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1394 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:44:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-03 02:44:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 189. [2022-11-03 02:44:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.4095744680851063) internal successors, (265), 188 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 265 transitions. [2022-11-03 02:44:10,557 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 265 transitions. Word has length 144 [2022-11-03 02:44:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:10,558 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 265 transitions. [2022-11-03 02:44:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:10,558 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 265 transitions. [2022-11-03 02:44:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:10,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:10,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:10,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:10,776 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1103769125, now seen corresponding path program 1 times [2022-11-03 02:44:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788607653] [2022-11-03 02:44:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:10,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:10,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:44:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:12,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:12,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788607653] [2022-11-03 02:44:12,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788607653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:12,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:12,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142020580] [2022-11-03 02:44:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:12,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:12,688 INFO L87 Difference]: Start difference. First operand 189 states and 265 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:13,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:13,547 INFO L93 Difference]: Finished difference Result 576 states and 834 transitions. [2022-11-03 02:44:13,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:13,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:44:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:13,551 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:44:13,551 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 02:44:13,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:13,553 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 639 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:13,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1007 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:44:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 02:44:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 197. [2022-11-03 02:44:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.4081632653061225) internal successors, (276), 196 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2022-11-03 02:44:13,564 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 144 [2022-11-03 02:44:13,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:13,565 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2022-11-03 02:44:13,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2022-11-03 02:44:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:13,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:13,567 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:13,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:13,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:13,784 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1874502691, now seen corresponding path program 1 times [2022-11-03 02:44:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:13,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495730099] [2022-11-03 02:44:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:13,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:13,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:13,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:13,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:44:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:15,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:15,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495730099] [2022-11-03 02:44:15,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495730099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:15,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:15,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:15,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236221107] [2022-11-03 02:44:15,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:15,645 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:16,480 INFO L93 Difference]: Finished difference Result 618 states and 896 transitions. [2022-11-03 02:44:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:16,484 INFO L225 Difference]: With dead ends: 618 [2022-11-03 02:44:16,485 INFO L226 Difference]: Without dead ends: 477 [2022-11-03 02:44:16,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:16,486 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 888 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:16,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1383 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:44:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-03 02:44:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 199. [2022-11-03 02:44:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.404040404040404) internal successors, (278), 198 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 278 transitions. [2022-11-03 02:44:16,498 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 278 transitions. Word has length 144 [2022-11-03 02:44:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:16,498 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 278 transitions. [2022-11-03 02:44:16,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 278 transitions. [2022-11-03 02:44:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:16,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:16,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:16,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:16,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:16,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1834188383, now seen corresponding path program 1 times [2022-11-03 02:44:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914234058] [2022-11-03 02:44:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:16,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:16,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:16,727 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:16,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:44:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:18,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:18,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:18,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:18,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914234058] [2022-11-03 02:44:18,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914234058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:18,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:18,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278838609] [2022-11-03 02:44:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:18,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:18,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:18,660 INFO L87 Difference]: Start difference. First operand 199 states and 278 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:19,522 INFO L93 Difference]: Finished difference Result 618 states and 895 transitions. [2022-11-03 02:44:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:19,525 INFO L225 Difference]: With dead ends: 618 [2022-11-03 02:44:19,525 INFO L226 Difference]: Without dead ends: 477 [2022-11-03 02:44:19,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:19,526 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 880 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:19,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1376 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:44:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-03 02:44:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 201. [2022-11-03 02:44:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.4) internal successors, (280), 200 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 280 transitions. [2022-11-03 02:44:19,538 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 280 transitions. Word has length 144 [2022-11-03 02:44:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:19,539 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 280 transitions. [2022-11-03 02:44:19,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 280 transitions. [2022-11-03 02:44:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:19,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:19,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:19,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:19,744 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -584296095, now seen corresponding path program 1 times [2022-11-03 02:44:19,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:19,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216120050] [2022-11-03 02:44:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:19,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:19,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:19,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:44:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:44:21,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:21,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:21,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216120050] [2022-11-03 02:44:21,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216120050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:21,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:21,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:44:21,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728631793] [2022-11-03 02:44:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:21,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:44:21,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:44:21,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:44:21,637 INFO L87 Difference]: Start difference. First operand 201 states and 280 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:22,497 INFO L93 Difference]: Finished difference Result 618 states and 894 transitions. [2022-11-03 02:44:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 144 [2022-11-03 02:44:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:22,500 INFO L225 Difference]: With dead ends: 618 [2022-11-03 02:44:22,500 INFO L226 Difference]: Without dead ends: 477 [2022-11-03 02:44:22,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:44:22,502 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 867 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:22,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1363 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:44:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-03 02:44:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 205. [2022-11-03 02:44:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.3970588235294117) internal successors, (285), 204 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 285 transitions. [2022-11-03 02:44:22,513 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 285 transitions. Word has length 144 [2022-11-03 02:44:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:22,514 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 285 transitions. [2022-11-03 02:44:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 02:44:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 285 transitions. [2022-11-03 02:44:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:22,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:22,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:22,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,740 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1642134173, now seen corresponding path program 1 times [2022-11-03 02:44:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639807884] [2022-11-03 02:44:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:22,745 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:22,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:44:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:24,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:24,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:24,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639807884] [2022-11-03 02:44:24,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639807884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:24,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:24,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:24,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665917010] [2022-11-03 02:44:24,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:24,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:24,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:24,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:24,600 INFO L87 Difference]: Start difference. First operand 205 states and 285 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:24,962 INFO L93 Difference]: Finished difference Result 555 states and 802 transitions. [2022-11-03 02:44:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 144 [2022-11-03 02:44:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:24,967 INFO L225 Difference]: With dead ends: 555 [2022-11-03 02:44:24,967 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 02:44:24,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:24,968 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 299 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:24,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 742 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:44:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 02:44:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 251. [2022-11-03 02:44:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.412) internal successors, (353), 250 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-11-03 02:44:24,980 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 144 [2022-11-03 02:44:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:24,980 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-11-03 02:44:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-11-03 02:44:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:24,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:24,982 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:25,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:25,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:25,188 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:25,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1808827621, now seen corresponding path program 1 times [2022-11-03 02:44:25,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:25,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782223381] [2022-11-03 02:44:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:25,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:25,192 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:44:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:27,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:27,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782223381] [2022-11-03 02:44:27,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782223381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:27,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:27,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627365509] [2022-11-03 02:44:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:27,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:27,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:27,072 INFO L87 Difference]: Start difference. First operand 251 states and 353 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:27,485 INFO L93 Difference]: Finished difference Result 672 states and 973 transitions. [2022-11-03 02:44:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:44:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:27,490 INFO L225 Difference]: With dead ends: 672 [2022-11-03 02:44:27,490 INFO L226 Difference]: Without dead ends: 531 [2022-11-03 02:44:27,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:27,491 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 649 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:27,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1106 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:44:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-03 02:44:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 253. [2022-11-03 02:44:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.4087301587301588) internal successors, (355), 252 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2022-11-03 02:44:27,501 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 144 [2022-11-03 02:44:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:27,502 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2022-11-03 02:44:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2022-11-03 02:44:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:27,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:27,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:27,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:27,720 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1736441063, now seen corresponding path program 1 times [2022-11-03 02:44:27,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257168724] [2022-11-03 02:44:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:27,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:27,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:44:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:29,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:29,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257168724] [2022-11-03 02:44:29,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257168724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:29,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:29,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:29,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178239917] [2022-11-03 02:44:29,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:29,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:29,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:29,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:29,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:29,517 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:29,881 INFO L93 Difference]: Finished difference Result 555 states and 800 transitions. [2022-11-03 02:44:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 144 [2022-11-03 02:44:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:29,885 INFO L225 Difference]: With dead ends: 555 [2022-11-03 02:44:29,885 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 02:44:29,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:29,886 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 282 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:29,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 740 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:44:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 02:44:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 257. [2022-11-03 02:44:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.40625) internal successors, (360), 256 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 360 transitions. [2022-11-03 02:44:29,898 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 360 transitions. Word has length 144 [2022-11-03 02:44:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:29,899 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 360 transitions. [2022-11-03 02:44:29,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 360 transitions. [2022-11-03 02:44:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:29,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:29,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:29,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:30,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:30,124 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1172322839, now seen corresponding path program 1 times [2022-11-03 02:44:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:30,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356382828] [2022-11-03 02:44:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:30,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:30,128 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:44:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:31,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:31,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:31,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356382828] [2022-11-03 02:44:31,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356382828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:31,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:31,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:31,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129871787] [2022-11-03 02:44:31,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:31,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:31,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:31,995 INFO L87 Difference]: Start difference. First operand 257 states and 360 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:32,351 INFO L93 Difference]: Finished difference Result 555 states and 799 transitions. [2022-11-03 02:44:32,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 144 [2022-11-03 02:44:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:32,356 INFO L225 Difference]: With dead ends: 555 [2022-11-03 02:44:32,356 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 02:44:32,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:32,357 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 266 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:32,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 739 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:44:32,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 02:44:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 263. [2022-11-03 02:44:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.4045801526717556) internal successors, (368), 262 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2022-11-03 02:44:32,369 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 144 [2022-11-03 02:44:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:32,369 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2022-11-03 02:44:32,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2022-11-03 02:44:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:32,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:32,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:32,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:32,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:32,586 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:32,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1317206123, now seen corresponding path program 1 times [2022-11-03 02:44:32,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:32,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686818809] [2022-11-03 02:44:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:32,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:32,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:32,589 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:32,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:44:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:34,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:34,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686818809] [2022-11-03 02:44:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686818809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:34,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:34,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448150037] [2022-11-03 02:44:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:34,440 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:34,882 INFO L93 Difference]: Finished difference Result 684 states and 988 transitions. [2022-11-03 02:44:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:34,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:44:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:34,891 INFO L225 Difference]: With dead ends: 684 [2022-11-03 02:44:34,891 INFO L226 Difference]: Without dead ends: 543 [2022-11-03 02:44:34,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:34,893 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 634 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:34,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:44:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-03 02:44:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 265. [2022-11-03 02:44:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.4015151515151516) internal successors, (370), 264 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 370 transitions. [2022-11-03 02:44:34,905 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 370 transitions. Word has length 144 [2022-11-03 02:44:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:34,906 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 370 transitions. [2022-11-03 02:44:34,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 370 transitions. [2022-11-03 02:44:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:34,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:34,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:34,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:35,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:35,122 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:35,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1739907949, now seen corresponding path program 1 times [2022-11-03 02:44:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:35,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644554937] [2022-11-03 02:44:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:35,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:35,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:35,126 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:35,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:44:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:36,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:36,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:36,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644554937] [2022-11-03 02:44:36,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644554937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:36,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:36,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779150448] [2022-11-03 02:44:36,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:36,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:36,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:37,000 INFO L87 Difference]: Start difference. First operand 265 states and 370 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:37,356 INFO L93 Difference]: Finished difference Result 555 states and 797 transitions. [2022-11-03 02:44:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:44:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 144 [2022-11-03 02:44:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:37,359 INFO L225 Difference]: With dead ends: 555 [2022-11-03 02:44:37,359 INFO L226 Difference]: Without dead ends: 414 [2022-11-03 02:44:37,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:37,360 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 248 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:37,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 736 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:44:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-03 02:44:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 269. [2022-11-03 02:44:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.3992537313432836) internal successors, (375), 268 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 02:44:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2022-11-03 02:44:37,371 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 144 [2022-11-03 02:44:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:37,372 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2022-11-03 02:44:37,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 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 02:44:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2022-11-03 02:44:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:37,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:37,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:37,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:37,588 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 151560047, now seen corresponding path program 1 times [2022-11-03 02:44:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:37,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734673133] [2022-11-03 02:44:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:37,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:37,594 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:37,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:44:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:39,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:44:39,470 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:39,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734673133] [2022-11-03 02:44:39,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734673133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:39,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:39,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076765638] [2022-11-03 02:44:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:39,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:39,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:39,472 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:39,935 INFO L93 Difference]: Finished difference Result 690 states and 995 transitions. [2022-11-03 02:44:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:44:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 144 [2022-11-03 02:44:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:39,937 INFO L225 Difference]: With dead ends: 690 [2022-11-03 02:44:39,937 INFO L226 Difference]: Without dead ends: 549 [2022-11-03 02:44:39,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:39,938 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 624 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:39,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1097 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:44:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-03 02:44:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 271. [2022-11-03 02:44:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.3962962962962964) internal successors, (377), 270 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 377 transitions. [2022-11-03 02:44:39,962 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 377 transitions. Word has length 144 [2022-11-03 02:44:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 377 transitions. [2022-11-03 02:44:39,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 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 02:44:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 377 transitions. [2022-11-03 02:44:39,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:39,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:39,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:40,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:40,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,192 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1128303631, now seen corresponding path program 1 times [2022-11-03 02:44:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:40,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748309267] [2022-11-03 02:44:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:40,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:40,196 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:40,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:44:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:41,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:42,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:44,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:44,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748309267] [2022-11-03 02:44:44,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748309267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005776146] [2022-11-03 02:44:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:44,096 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:44,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-03 02:44:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:47,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:48,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005776146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:48,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324906043] [2022-11-03 02:44:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:48,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:48,599 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:48,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-03 02:44:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:50,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:51,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324906043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:51,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:51,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:44:51,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398293470] [2022-11-03 02:44:51,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:51,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:44:51,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:44:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:44:51,419 INFO L87 Difference]: Start difference. First operand 271 states and 377 transitions. Second operand has 16 states, 16 states have (on average 17.4375) internal successors, (279), 16 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:51,677 INFO L93 Difference]: Finished difference Result 580 states and 826 transitions. [2022-11-03 02:44:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:44:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.4375) internal successors, (279), 16 states have internal predecessors, (279), 0 states have call successors, (0), 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 144 [2022-11-03 02:44:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:51,679 INFO L225 Difference]: With dead ends: 580 [2022-11-03 02:44:51,679 INFO L226 Difference]: Without dead ends: 439 [2022-11-03 02:44:51,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 840 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:44:51,680 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 554 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:51,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 2482 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-03 02:44:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-03 02:44:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 326. [2022-11-03 02:44:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.3876923076923078) internal successors, (451), 325 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 451 transitions. [2022-11-03 02:44:51,695 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 451 transitions. Word has length 144 [2022-11-03 02:44:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:51,695 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 451 transitions. [2022-11-03 02:44:51,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.4375) internal successors, (279), 16 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 451 transitions. [2022-11-03 02:44:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:44:51,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:51,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:51,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:51,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 02:44:52,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:52,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:52,312 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1521330641, now seen corresponding path program 1 times [2022-11-03 02:44:52,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589555972] [2022-11-03 02:44:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:52,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:52,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:52,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:52,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:44:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:55,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589555972] [2022-11-03 02:44:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589555972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394761536] [2022-11-03 02:44:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:55,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:55,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:55,725 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:55,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:44:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:59,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394761536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077744527] [2022-11-03 02:44:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:59,712 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 02:45:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:02,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:03,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077744527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:03,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:03,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:45:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644863362] [2022-11-03 02:45:03,362 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:45:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:45:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:45:03,365 INFO L87 Difference]: Start difference. First operand 326 states and 451 transitions. Second operand has 28 states, 28 states have (on average 19.964285714285715) internal successors, (559), 28 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:04,568 INFO L93 Difference]: Finished difference Result 573 states and 802 transitions. [2022-11-03 02:45:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:45:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 19.964285714285715) internal successors, (559), 28 states have internal predecessors, (559), 0 states have call successors, (0), 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 144 [2022-11-03 02:45:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:04,576 INFO L225 Difference]: With dead ends: 573 [2022-11-03 02:45:04,576 INFO L226 Difference]: Without dead ends: 432 [2022-11-03 02:45:04,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 832 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:45:04,578 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 303 mSDsluCounter, 2971 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 3156 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:04,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 3156 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-03 02:45:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-03 02:45:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-11-03 02:45:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.3735498839907192) internal successors, (592), 431 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 592 transitions. [2022-11-03 02:45:04,608 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 592 transitions. Word has length 144 [2022-11-03 02:45:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:04,608 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 592 transitions. [2022-11-03 02:45:04,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 19.964285714285715) internal successors, (559), 28 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:04,609 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 592 transitions. [2022-11-03 02:45:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:45:04,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:04,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:04,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-03 02:45:04,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:05,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:05,224 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1964290029, now seen corresponding path program 1 times [2022-11-03 02:45:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:05,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978910426] [2022-11-03 02:45:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:05,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:05,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:05,228 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:05,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:45:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:06,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:07,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:08,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:08,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978910426] [2022-11-03 02:45:08,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978910426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:08,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757207827] [2022-11-03 02:45:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:08,461 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:08,462 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:08,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:45:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:11,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757207827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220616535] [2022-11-03 02:45:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:12,594 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:12,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:45:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:14,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:16,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220616535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:16,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:16,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:45:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868556809] [2022-11-03 02:45:16,072 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:16,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:45:16,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:45:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:45:16,074 INFO L87 Difference]: Start difference. First operand 432 states and 592 transitions. Second operand has 28 states, 28 states have (on average 20.035714285714285) internal successors, (561), 28 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:16,839 INFO L93 Difference]: Finished difference Result 777 states and 1072 transitions. [2022-11-03 02:45:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:45:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 20.035714285714285) internal successors, (561), 28 states have internal predecessors, (561), 0 states have call successors, (0), 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 144 [2022-11-03 02:45:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:16,840 INFO L225 Difference]: With dead ends: 777 [2022-11-03 02:45:16,840 INFO L226 Difference]: Without dead ends: 636 [2022-11-03 02:45:16,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 833 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:45:16,842 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 413 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:16,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2733 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-11-03 02:45:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-03 02:45:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 636. [2022-11-03 02:45:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3543307086614174) internal successors, (860), 635 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 860 transitions. [2022-11-03 02:45:16,879 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 860 transitions. Word has length 144 [2022-11-03 02:45:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:16,879 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 860 transitions. [2022-11-03 02:45:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.035714285714285) internal successors, (561), 28 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 860 transitions. [2022-11-03 02:45:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:45:16,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:16,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:16,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:17,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:17,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 02:45:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:17,497 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1077429967, now seen corresponding path program 1 times [2022-11-03 02:45:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:17,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420162174] [2022-11-03 02:45:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:17,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:17,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:17,501 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:17,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:45:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:18,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:19,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:20,797 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420162174] [2022-11-03 02:45:20,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420162174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:20,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558103563] [2022-11-03 02:45:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:20,798 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:45:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:24,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:24,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558103563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:24,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827419242] [2022-11-03 02:45:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:24,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:24,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:24,936 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:24,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 02:45:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:26,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:28,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827419242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:28,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:28,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:45:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739207064] [2022-11-03 02:45:28,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:45:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:45:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:45:28,335 INFO L87 Difference]: Start difference. First operand 636 states and 860 transitions. Second operand has 28 states, 28 states have (on average 19.821428571428573) internal successors, (555), 28 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:29,332 INFO L93 Difference]: Finished difference Result 867 states and 1187 transitions. [2022-11-03 02:45:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:45:29,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 19.821428571428573) internal successors, (555), 28 states have internal predecessors, (555), 0 states have call successors, (0), 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 144 [2022-11-03 02:45:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:29,335 INFO L225 Difference]: With dead ends: 867 [2022-11-03 02:45:29,335 INFO L226 Difference]: Without dead ends: 726 [2022-11-03 02:45:29,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 833 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:45:29,337 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 392 mSDsluCounter, 2708 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:29,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 2893 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-03 02:45:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-11-03 02:45:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 636. [2022-11-03 02:45:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.3543307086614174) internal successors, (860), 635 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 860 transitions. [2022-11-03 02:45:29,380 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 860 transitions. Word has length 144 [2022-11-03 02:45:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:29,381 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 860 transitions. [2022-11-03 02:45:29,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 19.821428571428573) internal successors, (555), 28 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 860 transitions. [2022-11-03 02:45:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:45:29,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:29,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:29,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:29,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:29,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:30,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:30,000 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1886776593, now seen corresponding path program 1 times [2022-11-03 02:45:30,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:30,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953069729] [2022-11-03 02:45:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:30,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:30,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:30,004 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:30,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 02:45:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:32,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:33,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:33,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953069729] [2022-11-03 02:45:33,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953069729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:33,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815134640] [2022-11-03 02:45:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:33,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:33,232 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:33,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 02:45:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:35,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:36,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815134640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:37,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247458402] [2022-11-03 02:45:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:37,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:37,394 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:37,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 02:45:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:45:38,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:39,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:40,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247458402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:40,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:40,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:45:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785774060] [2022-11-03 02:45:40,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:45:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:45:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:45:40,017 INFO L87 Difference]: Start difference. First operand 636 states and 860 transitions. Second operand has 16 states, 16 states have (on average 17.6875) internal successors, (283), 16 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:40,237 INFO L93 Difference]: Finished difference Result 1064 states and 1462 transitions. [2022-11-03 02:45:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:45:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.6875) internal successors, (283), 16 states have internal predecessors, (283), 0 states have call successors, (0), 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 144 [2022-11-03 02:45:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:40,242 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 02:45:40,243 INFO L226 Difference]: Without dead ends: 923 [2022-11-03 02:45:40,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 840 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:45:40,244 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 426 mSDsluCounter, 1829 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:40,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 2157 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-03 02:45:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-11-03 02:45:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 820. [2022-11-03 02:45:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 1.343101343101343) internal successors, (1100), 819 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1100 transitions. [2022-11-03 02:45:40,303 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1100 transitions. Word has length 144 [2022-11-03 02:45:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:40,304 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1100 transitions. [2022-11-03 02:45:40,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.6875) internal successors, (283), 16 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1100 transitions. [2022-11-03 02:45:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:45:40,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:40,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:40,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:40,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:40,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-03 02:45:40,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:40,922 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:40,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1829518291, now seen corresponding path program 1 times [2022-11-03 02:45:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:40,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230887058] [2022-11-03 02:45:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:40,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:40,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:40,926 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:40,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:45:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:45:42,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:55,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230887058] [2022-11-03 02:45:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230887058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70592419] [2022-11-03 02:45:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:55,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:55,160 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:45:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:45:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:00,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:25,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [70592419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:25,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131364114] [2022-11-03 02:47:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:25,484 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:25,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-03 02:47:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:47:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:29,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:47:39,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131364114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:39,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:39,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 53 [2022-11-03 02:47:39,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442844430] [2022-11-03 02:47:39,268 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:39,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-03 02:47:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-03 02:47:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2410, Unknown=34, NotChecked=0, Total=2756 [2022-11-03 02:47:39,271 INFO L87 Difference]: Start difference. First operand 820 states and 1100 transitions. Second operand has 53 states, 53 states have (on average 13.20754716981132) internal successors, (700), 53 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:48,260 INFO L93 Difference]: Finished difference Result 1617 states and 2173 transitions. [2022-11-03 02:47:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 02:47:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 13.20754716981132) internal successors, (700), 53 states have internal predecessors, (700), 0 states have call successors, (0), 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 144 [2022-11-03 02:47:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:48,265 INFO L225 Difference]: With dead ends: 1617 [2022-11-03 02:47:48,265 INFO L226 Difference]: Without dead ends: 1615 [2022-11-03 02:47:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 815 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 107.2s TimeCoverageRelationStatistics Valid=760, Invalid=5526, Unknown=34, NotChecked=0, Total=6320 [2022-11-03 02:47:48,269 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1260 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 6080 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:48,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1260 Valid, 6080 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-11-03 02:47:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-11-03 02:47:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1584. [2022-11-03 02:47:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 1.3480732785849652) internal successors, (2134), 1583 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2134 transitions. [2022-11-03 02:47:48,384 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2134 transitions. Word has length 144 [2022-11-03 02:47:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:48,385 INFO L495 AbstractCegarLoop]: Abstraction has 1584 states and 2134 transitions. [2022-11-03 02:47:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 13.20754716981132) internal successors, (700), 53 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2134 transitions. [2022-11-03 02:47:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:47:48,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:48,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:48,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:48,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:47:48,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:49,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:49,007 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 81524267, now seen corresponding path program 1 times [2022-11-03 02:47:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:49,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284757849] [2022-11-03 02:47:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:49,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:49,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:49,011 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:49,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:47:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:47:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:52,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:00,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:00,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284757849] [2022-11-03 02:48:00,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284757849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:00,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [158316314] [2022-11-03 02:48:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:00,829 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:00,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:48:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:48:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:05,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:57,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [158316314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79759214] [2022-11-03 02:48:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:57,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:57,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:57,716 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:57,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:48:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:48:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:01,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:49:08,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79759214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:08,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:49:08,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 43 [2022-11-03 02:49:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941420613] [2022-11-03 02:49:08,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:49:08,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:08,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:49:08,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1582, Unknown=23, NotChecked=0, Total=1806 [2022-11-03 02:49:08,447 INFO L87 Difference]: Start difference. First operand 1584 states and 2134 transitions. Second operand has 43 states, 43 states have (on average 16.25581395348837) internal successors, (699), 43 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:12,475 INFO L93 Difference]: Finished difference Result 3099 states and 4180 transitions. [2022-11-03 02:49:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:49:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 16.25581395348837) internal successors, (699), 43 states have internal predecessors, (699), 0 states have call successors, (0), 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 144 [2022-11-03 02:49:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:12,481 INFO L225 Difference]: With dead ends: 3099 [2022-11-03 02:49:12,481 INFO L226 Difference]: Without dead ends: 3097 [2022-11-03 02:49:12,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 823 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=558, Invalid=3841, Unknown=23, NotChecked=0, Total=4422 [2022-11-03 02:49:12,484 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 862 mSDsluCounter, 5237 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:12,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 5408 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-11-03 02:49:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2022-11-03 02:49:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 3036. [2022-11-03 02:49:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 1.3528830313014828) internal successors, (4106), 3035 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 4106 transitions. [2022-11-03 02:49:12,723 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 4106 transitions. Word has length 144 [2022-11-03 02:49:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:12,724 INFO L495 AbstractCegarLoop]: Abstraction has 3036 states and 4106 transitions. [2022-11-03 02:49:12,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 16.25581395348837) internal successors, (699), 43 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 4106 transitions. [2022-11-03 02:49:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:49:12,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:12,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:12,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:12,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:13,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:13,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:13,352 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash 741055789, now seen corresponding path program 1 times [2022-11-03 02:49:13,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:13,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681288583] [2022-11-03 02:49:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:13,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:13,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:13,358 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:13,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:49:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:14,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:49:14,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:16,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:16,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:24,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681288583] [2022-11-03 02:49:24,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681288583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:24,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1131121356] [2022-11-03 02:49:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:24,994 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:49:24,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:49:24,995 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:49:24,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 02:49:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:27,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:49:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:29,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:35,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1131121356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865083734] [2022-11-03 02:50:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:35,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:35,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:35,002 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8a58c90-5e65-487c-b606-9e630c2bb884/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 02:50:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2915 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:50:36,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:38,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:50:45,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865083734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:45,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:50:45,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 13, 13] total 44 [2022-11-03 02:50:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518576867] [2022-11-03 02:50:45,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:50:45,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 02:50:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:50:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 02:50:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1634, Unknown=28, NotChecked=0, Total=1892 [2022-11-03 02:50:45,660 INFO L87 Difference]: Start difference. First operand 3036 states and 4106 transitions. Second operand has 44 states, 44 states have (on average 15.909090909090908) internal successors, (700), 44 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)