./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.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_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/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_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/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_71d3790f-be86-4ae5-9470-e8f61d75bda1/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 c74d906337e06c8dd2c0528b072883bb6b5dcc493fa945e0ee9e0dd423781a39 --- 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 02:07:17,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:17,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:17,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:17,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:17,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:17,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:17,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:17,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:17,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:17,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:17,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:17,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:17,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:17,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:17,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:17,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:17,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:17,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:17,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:17,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:17,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:17,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:17,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:17,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:17,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:17,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:17,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:17,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:17,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:17,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:17,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:17,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:17,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:17,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:17,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:17,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:17,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:17,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:17,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:17,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:17,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:07:17,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:17,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:17,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:17,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:17,268 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:17,268 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:17,269 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:17,269 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:17,269 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:17,269 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:17,270 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:17,271 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:17,271 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:17,271 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:17,271 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:17,272 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:17,272 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:17,272 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:17,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:17,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:17,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:17,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:17,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:17,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:17,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:17,274 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:17,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:17,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:17,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:17,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:17,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:17,276 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:17,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:17,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:17,277 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:17,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:17,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:17,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:17,278 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74d906337e06c8dd2c0528b072883bb6b5dcc493fa945e0ee9e0dd423781a39 [2022-11-03 02:07:17,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:17,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:17,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:17,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:17,666 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:17,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:07:17,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/ca46f21f3/d991d0f4b7fe4000a8cb5dcbbe864501/FLAGfebce43f2 [2022-11-03 02:07:18,573 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:18,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:07:18,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/ca46f21f3/d991d0f4b7fe4000a8cb5dcbbe864501/FLAGfebce43f2 [2022-11-03 02:07:18,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/ca46f21f3/d991d0f4b7fe4000a8cb5dcbbe864501 [2022-11-03 02:07:18,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:18,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:18,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:18,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:18,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:18,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:18" (1/1) ... [2022-11-03 02:07:18,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5161fa37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:18, skipping insertion in model container [2022-11-03 02:07:18,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:18" (1/1) ... [2022-11-03 02:07:18,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:18,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:19,110 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:19,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:19,647 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:19,660 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c[1014,1027] [2022-11-03 02:07:19,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:19,993 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:19,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19 WrapperNode [2022-11-03 02:07:19,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:19,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:19,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:19,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:20,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,557 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3137 [2022-11-03 02:07:20,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:20,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:20,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:20,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:20,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:20,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:21,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:21,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:21,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:21,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:21,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (1/1) ... [2022-11-03 02:07:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:21,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:21,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:21,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:21,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:21,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:21,913 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:21,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:09:14,573 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:10:19,321 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:10:19,321 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:10:19,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:19 BoogieIcfgContainer [2022-11-03 02:10:19,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:10:19,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:10:19,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:10:19,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:10:19,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:18" (1/3) ... [2022-11-03 02:10:19,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c9a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:19, skipping insertion in model container [2022-11-03 02:10:19,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:19" (2/3) ... [2022-11-03 02:10:19,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392c9a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:19, skipping insertion in model container [2022-11-03 02:10:19,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:19" (3/3) ... [2022-11-03 02:10:19,337 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:10:19,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:10:19,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:10:19,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:10:19,436 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;@7bf583be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:10:19,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:10:19,442 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 02:10:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:10:19,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:19,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:10:19,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 23572946, now seen corresponding path program 1 times [2022-11-03 02:10:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471425847] [2022-11-03 02:10:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:10:20,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:10:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:10:20,889 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:10:20,893 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:10:20,896 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:10:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:10:20,904 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:10:20,910 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:10:20,971 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:10:21,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:10:21 BoogieIcfgContainer [2022-11-03 02:10:21,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:10:21,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:10:21,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:10:21,007 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:10:21,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:19" (3/4) ... [2022-11-03 02:10:21,013 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:10:21,013 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:10:21,016 INFO L158 Benchmark]: Toolchain (without parser) took 182299.90ms. Allocated memory was 115.3MB in the beginning and 6.2GB in the end (delta: 6.1GB). Free memory was 79.4MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 979.7MB. Max. memory is 16.1GB. [2022-11-03 02:10:21,017 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 79.7MB. Free memory was 37.4MB in the beginning and 37.4MB in the end (delta: 33.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:10:21,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1275.32ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 58.9MB in the end (delta: 20.4MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2022-11-03 02:10:21,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 562.58ms. Allocated memory was 115.3MB in the beginning and 188.7MB in the end (delta: 73.4MB). Free memory was 58.9MB in the beginning and 98.1MB in the end (delta: -39.3MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. [2022-11-03 02:10:21,027 INFO L158 Benchmark]: Boogie Preprocessor took 475.47ms. Allocated memory is still 188.7MB. Free memory was 98.1MB in the beginning and 87.7MB in the end (delta: 10.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2022-11-03 02:10:21,028 INFO L158 Benchmark]: RCFGBuilder took 178288.65ms. Allocated memory was 188.7MB in the beginning and 6.2GB in the end (delta: 6.0GB). Free memory was 87.7MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. [2022-11-03 02:10:21,029 INFO L158 Benchmark]: TraceAbstraction took 1677.59ms. Allocated memory is still 6.2GB. Free memory was 5.3GB in the beginning and 5.2GB in the end (delta: 133.2MB). Peak memory consumption was 132.1MB. Max. memory is 16.1GB. [2022-11-03 02:10:21,030 INFO L158 Benchmark]: Witness Printer took 7.43ms. Allocated memory is still 6.2GB. Free memory is still 5.2GB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:10:21,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 79.7MB. Free memory was 37.4MB in the beginning and 37.4MB in the end (delta: 33.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1275.32ms. Allocated memory is still 115.3MB. Free memory was 79.3MB in the beginning and 58.9MB in the end (delta: 20.4MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 562.58ms. Allocated memory was 115.3MB in the beginning and 188.7MB in the end (delta: 73.4MB). Free memory was 58.9MB in the beginning and 98.1MB in the end (delta: -39.3MB). Peak memory consumption was 40.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 475.47ms. Allocated memory is still 188.7MB. Free memory was 98.1MB in the beginning and 87.7MB in the end (delta: 10.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * RCFGBuilder took 178288.65ms. Allocated memory was 188.7MB in the beginning and 6.2GB in the end (delta: 6.0GB). Free memory was 87.7MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. * TraceAbstraction took 1677.59ms. Allocated memory is still 6.2GB. Free memory was 5.3GB in the beginning and 5.2GB in the end (delta: 133.2MB). Peak memory consumption was 132.1MB. Max. memory is 16.1GB. * Witness Printer took 7.43ms. Allocated memory is still 6.2GB. Free memory is still 5.2GB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 342, overapproximation of bitwiseAnd at line 235. 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_46 = 0; [L39] const SORT_4 var_99 = 1; [L40] const SORT_4 var_100 = 0; [L41] const SORT_2 var_114 = 0; [L42] const SORT_2 var_116 = 1; [L43] const SORT_3 var_141 = 0; [L44] const SORT_2 var_190 = 2; [L45] const SORT_2 var_192 = 3; [L46] const SORT_4 var_389 = 5; [L47] const SORT_2 var_401 = 5; [L48] const SORT_4 var_510 = 2; [L49] const SORT_4 var_555 = 3; [L50] const SORT_4 var_600 = 4; [L52] SORT_1 input_113; [L53] SORT_1 input_115; [L54] SORT_1 input_120; [L55] SORT_1 input_121; [L56] SORT_1 input_125; [L57] SORT_1 input_126; [L58] SORT_1 input_130; [L59] SORT_1 input_131; [L60] SORT_1 input_135; [L61] SORT_1 input_136; [L62] SORT_1 input_140; [L63] SORT_1 input_148; [L64] SORT_1 input_155; [L65] SORT_1 input_162; [L66] SORT_1 input_169; [L67] SORT_1 input_176; [L68] SORT_1 input_180; [L69] SORT_1 input_181; [L70] SORT_1 input_201; [L71] SORT_1 input_205; [L72] SORT_1 input_206; [L73] SORT_1 input_224; [L74] SORT_1 input_228; [L75] SORT_1 input_229; [L76] SORT_1 input_247; [L77] SORT_1 input_251; [L78] SORT_1 input_252; [L79] SORT_1 input_270; [L80] SORT_1 input_274; [L81] SORT_1 input_275; [L82] SORT_1 input_300; [L83] SORT_1 input_303; [L84] SORT_1 input_319; [L85] SORT_1 input_322; [L86] SORT_1 input_338; [L87] SORT_1 input_341; [L88] SORT_1 input_357; [L89] SORT_1 input_360; [L90] SORT_1 input_376; [L91] SORT_1 input_379; [L93] SORT_2 state_6 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L94] SORT_2 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L95] SORT_2 state_10 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L96] SORT_2 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L97] SORT_2 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L98] SORT_2 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L99] SORT_2 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L100] SORT_2 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L101] SORT_2 state_22 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L102] SORT_2 state_24 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L103] SORT_2 state_26 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L104] SORT_2 state_28 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L105] SORT_2 state_30 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L106] SORT_2 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L107] SORT_2 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L108] SORT_2 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L109] SORT_2 state_38 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L110] SORT_2 state_40 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L111] SORT_2 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L112] SORT_2 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_2; [L113] SORT_1 state_47 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L114] SORT_1 state_49 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L115] SORT_1 state_51 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L116] SORT_1 state_53 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L117] SORT_1 state_55 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L118] SORT_1 state_57 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L119] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L120] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L121] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L122] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L123] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L124] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L125] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L126] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L127] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L128] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L129] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L130] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L131] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L132] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L133] SORT_1 state_87 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L134] SORT_1 state_89 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L135] SORT_1 state_91 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L136] SORT_1 state_93 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L137] SORT_1 state_95 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L138] SORT_1 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L140] SORT_2 init_7_arg_1 = var_5; [L141] state_6 = init_7_arg_1 [L142] SORT_2 init_9_arg_1 = var_5; [L143] state_8 = init_9_arg_1 [L144] SORT_2 init_11_arg_1 = var_5; [L145] state_10 = init_11_arg_1 [L146] SORT_2 init_13_arg_1 = var_5; [L147] state_12 = init_13_arg_1 [L148] SORT_2 init_15_arg_1 = var_5; [L149] state_14 = init_15_arg_1 [L150] SORT_2 init_17_arg_1 = var_5; [L151] state_16 = init_17_arg_1 [L152] SORT_2 init_19_arg_1 = var_5; [L153] state_18 = init_19_arg_1 [L154] SORT_2 init_21_arg_1 = var_5; [L155] state_20 = init_21_arg_1 [L156] SORT_2 init_23_arg_1 = var_5; [L157] state_22 = init_23_arg_1 [L158] SORT_2 init_25_arg_1 = var_5; [L159] state_24 = init_25_arg_1 [L160] SORT_2 init_27_arg_1 = var_5; [L161] state_26 = init_27_arg_1 [L162] SORT_2 init_29_arg_1 = var_5; [L163] state_28 = init_29_arg_1 [L164] SORT_2 init_31_arg_1 = var_5; [L165] state_30 = init_31_arg_1 [L166] SORT_2 init_33_arg_1 = var_5; [L167] state_32 = init_33_arg_1 [L168] SORT_2 init_35_arg_1 = var_5; [L169] state_34 = init_35_arg_1 [L170] SORT_2 init_37_arg_1 = var_5; [L171] state_36 = init_37_arg_1 [L172] SORT_2 init_39_arg_1 = var_5; [L173] state_38 = init_39_arg_1 [L174] SORT_2 init_41_arg_1 = var_5; [L175] state_40 = init_41_arg_1 [L176] SORT_2 init_43_arg_1 = var_5; [L177] state_42 = init_43_arg_1 [L178] SORT_2 init_45_arg_1 = var_5; [L179] state_44 = init_45_arg_1 [L180] SORT_1 init_48_arg_1 = var_46; [L181] state_47 = init_48_arg_1 [L182] SORT_1 init_50_arg_1 = var_46; [L183] state_49 = init_50_arg_1 [L184] SORT_1 init_52_arg_1 = var_46; [L185] state_51 = init_52_arg_1 [L186] SORT_1 init_54_arg_1 = var_46; [L187] state_53 = init_54_arg_1 [L188] SORT_1 init_56_arg_1 = var_46; [L189] state_55 = init_56_arg_1 [L190] SORT_1 init_58_arg_1 = var_46; [L191] state_57 = init_58_arg_1 [L192] SORT_1 init_60_arg_1 = var_46; [L193] state_59 = init_60_arg_1 [L194] SORT_1 init_62_arg_1 = var_46; [L195] state_61 = init_62_arg_1 [L196] SORT_1 init_64_arg_1 = var_46; [L197] state_63 = init_64_arg_1 [L198] SORT_1 init_66_arg_1 = var_46; [L199] state_65 = init_66_arg_1 [L200] SORT_1 init_68_arg_1 = var_46; [L201] state_67 = init_68_arg_1 [L202] SORT_1 init_70_arg_1 = var_46; [L203] state_69 = init_70_arg_1 [L204] SORT_1 init_72_arg_1 = var_46; [L205] state_71 = init_72_arg_1 [L206] SORT_1 init_74_arg_1 = var_46; [L207] state_73 = init_74_arg_1 [L208] SORT_1 init_76_arg_1 = var_46; [L209] state_75 = init_76_arg_1 [L210] SORT_1 init_78_arg_1 = var_46; [L211] state_77 = init_78_arg_1 [L212] SORT_1 init_80_arg_1 = var_46; [L213] state_79 = init_80_arg_1 [L214] SORT_1 init_82_arg_1 = var_46; [L215] state_81 = init_82_arg_1 [L216] SORT_1 init_84_arg_1 = var_46; [L217] state_83 = init_84_arg_1 [L218] SORT_1 init_86_arg_1 = var_46; [L219] state_85 = init_86_arg_1 [L220] SORT_1 init_88_arg_1 = var_46; [L221] state_87 = init_88_arg_1 [L222] SORT_1 init_90_arg_1 = var_46; [L223] state_89 = init_90_arg_1 [L224] SORT_1 init_92_arg_1 = var_46; [L225] state_91 = init_92_arg_1 [L226] SORT_1 init_94_arg_1 = var_46; [L227] state_93 = init_94_arg_1 [L228] SORT_1 init_96_arg_1 = var_46; [L229] state_95 = init_96_arg_1 [L230] SORT_1 init_98_arg_1 = var_46; [L231] state_97 = init_98_arg_1 VAL [init_11_arg_1=0, init_13_arg_1=0, init_15_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_23_arg_1=0, init_25_arg_1=0, init_27_arg_1=0, init_29_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_35_arg_1=0, init_37_arg_1=0, init_39_arg_1=0, init_41_arg_1=0, init_43_arg_1=0, init_45_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_12=0, state_14=0, state_16=0, state_18=0, state_20=0, state_22=0, state_24=0, state_26=0, state_28=0, state_30=0, state_32=0, state_34=0, state_36=0, state_38=0, state_40=0, state_42=0, state_44=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, var_100=0, var_114=0, var_116=1, var_141=0, var_190=2, var_192=3, var_389=5, var_401=5, var_46=0, var_5=0, var_510=2, var_555=3, var_600=4, var_99=1] [L234] input_113 = __VERIFIER_nondet_uchar() [L235] input_113 = input_113 & mask_SORT_1 [L236] input_115 = __VERIFIER_nondet_uchar() [L237] input_115 = input_115 & mask_SORT_1 [L238] input_120 = __VERIFIER_nondet_uchar() [L239] input_120 = input_120 & mask_SORT_1 [L240] input_121 = __VERIFIER_nondet_uchar() [L241] input_121 = input_121 & mask_SORT_1 [L242] input_125 = __VERIFIER_nondet_uchar() [L243] input_125 = input_125 & mask_SORT_1 [L244] input_126 = __VERIFIER_nondet_uchar() [L245] input_126 = input_126 & mask_SORT_1 [L246] input_130 = __VERIFIER_nondet_uchar() [L247] input_130 = input_130 & mask_SORT_1 [L248] input_131 = __VERIFIER_nondet_uchar() [L249] input_131 = input_131 & mask_SORT_1 [L250] input_135 = __VERIFIER_nondet_uchar() [L251] input_135 = input_135 & mask_SORT_1 [L252] input_136 = __VERIFIER_nondet_uchar() [L253] input_136 = input_136 & mask_SORT_1 [L254] input_140 = __VERIFIER_nondet_uchar() [L255] input_140 = input_140 & mask_SORT_1 [L256] input_148 = __VERIFIER_nondet_uchar() [L257] input_148 = input_148 & mask_SORT_1 [L258] input_155 = __VERIFIER_nondet_uchar() [L259] input_155 = input_155 & mask_SORT_1 [L260] input_162 = __VERIFIER_nondet_uchar() [L261] input_162 = input_162 & mask_SORT_1 [L262] input_169 = __VERIFIER_nondet_uchar() [L263] input_169 = input_169 & mask_SORT_1 [L264] input_176 = __VERIFIER_nondet_uchar() [L265] input_176 = input_176 & mask_SORT_1 [L266] input_180 = __VERIFIER_nondet_uchar() [L267] input_180 = input_180 & mask_SORT_1 [L268] input_181 = __VERIFIER_nondet_uchar() [L269] input_181 = input_181 & mask_SORT_1 [L270] input_201 = __VERIFIER_nondet_uchar() [L271] input_201 = input_201 & mask_SORT_1 [L272] input_205 = __VERIFIER_nondet_uchar() [L273] input_205 = input_205 & mask_SORT_1 [L274] input_206 = __VERIFIER_nondet_uchar() [L275] input_206 = input_206 & mask_SORT_1 [L276] input_224 = __VERIFIER_nondet_uchar() [L277] input_224 = input_224 & mask_SORT_1 [L278] input_228 = __VERIFIER_nondet_uchar() [L279] input_228 = input_228 & mask_SORT_1 [L280] input_229 = __VERIFIER_nondet_uchar() [L281] input_229 = input_229 & mask_SORT_1 [L282] input_247 = __VERIFIER_nondet_uchar() [L283] input_247 = input_247 & mask_SORT_1 [L284] input_251 = __VERIFIER_nondet_uchar() [L285] input_251 = input_251 & mask_SORT_1 [L286] input_252 = __VERIFIER_nondet_uchar() [L287] input_252 = input_252 & mask_SORT_1 [L288] input_270 = __VERIFIER_nondet_uchar() [L289] input_270 = input_270 & mask_SORT_1 [L290] input_274 = __VERIFIER_nondet_uchar() [L291] input_274 = input_274 & mask_SORT_1 [L292] input_275 = __VERIFIER_nondet_uchar() [L293] input_275 = input_275 & mask_SORT_1 [L294] input_300 = __VERIFIER_nondet_uchar() [L295] input_303 = __VERIFIER_nondet_uchar() [L296] input_319 = __VERIFIER_nondet_uchar() [L297] input_322 = __VERIFIER_nondet_uchar() [L298] input_338 = __VERIFIER_nondet_uchar() [L299] input_341 = __VERIFIER_nondet_uchar() [L300] input_357 = __VERIFIER_nondet_uchar() [L301] input_360 = __VERIFIER_nondet_uchar() [L302] input_376 = __VERIFIER_nondet_uchar() [L303] input_379 = __VERIFIER_nondet_uchar() [L306] SORT_1 var_101_arg_0 = state_55; [L307] SORT_4 var_101_arg_1 = var_99; [L308] SORT_4 var_101_arg_2 = var_100; [L309] EXPR var_101_arg_0 ? var_101_arg_1 : var_101_arg_2 [L309] SORT_4 var_101 = var_101_arg_0 ? var_101_arg_1 : var_101_arg_2; [L310] SORT_1 var_102_arg_0 = state_65; [L311] SORT_4 var_102_arg_1 = var_99; [L312] SORT_4 var_102_arg_2 = var_100; [L313] EXPR var_102_arg_0 ? var_102_arg_1 : var_102_arg_2 [L313] SORT_4 var_102 = var_102_arg_0 ? var_102_arg_1 : var_102_arg_2; [L314] SORT_4 var_103_arg_0 = var_101; [L315] SORT_4 var_103_arg_1 = var_102; [L316] SORT_4 var_103 = var_103_arg_0 + var_103_arg_1; [L317] SORT_1 var_104_arg_0 = state_75; [L318] SORT_4 var_104_arg_1 = var_99; [L319] SORT_4 var_104_arg_2 = var_100; [L320] EXPR var_104_arg_0 ? var_104_arg_1 : var_104_arg_2 [L320] SORT_4 var_104 = var_104_arg_0 ? var_104_arg_1 : var_104_arg_2; [L321] SORT_4 var_105_arg_0 = var_103; [L322] SORT_4 var_105_arg_1 = var_104; [L323] SORT_4 var_105 = var_105_arg_0 + var_105_arg_1; [L324] SORT_1 var_106_arg_0 = state_85; [L325] SORT_4 var_106_arg_1 = var_99; [L326] SORT_4 var_106_arg_2 = var_100; [L327] EXPR var_106_arg_0 ? var_106_arg_1 : var_106_arg_2 [L327] SORT_4 var_106 = var_106_arg_0 ? var_106_arg_1 : var_106_arg_2; [L328] SORT_4 var_107_arg_0 = var_105; [L329] SORT_4 var_107_arg_1 = var_106; [L330] SORT_4 var_107 = var_107_arg_0 + var_107_arg_1; [L331] SORT_1 var_108_arg_0 = state_95; [L332] SORT_4 var_108_arg_1 = var_99; [L333] SORT_4 var_108_arg_2 = var_100; [L334] EXPR var_108_arg_0 ? var_108_arg_1 : var_108_arg_2 [L334] SORT_4 var_108 = var_108_arg_0 ? var_108_arg_1 : var_108_arg_2; [L335] SORT_4 var_109_arg_0 = var_107; [L336] SORT_4 var_109_arg_1 = var_108; [L337] SORT_4 var_109 = var_109_arg_0 + var_109_arg_1; [L338] var_109 = var_109 & mask_SORT_4 [L339] SORT_4 var_110_arg_0 = var_109; [L340] SORT_4 var_110_arg_1 = var_99; [L341] SORT_1 var_110 = var_110_arg_0 <= var_110_arg_1; [L342] SORT_1 var_111_arg_0 = ~state_97; [L343] var_111_arg_0 = var_111_arg_0 & mask_SORT_1 [L344] SORT_1 var_111_arg_1 = ~var_110; [L345] var_111_arg_1 = var_111_arg_1 & mask_SORT_1 [L346] SORT_1 var_111 = var_111_arg_0 & var_111_arg_1; [L347] var_111 = var_111 & mask_SORT_1 [L348] SORT_1 bad_112_arg_0 = var_111; [L349] CALL __VERIFIER_assert(!(bad_112_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: 1.5s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s 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 02:10:21,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/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_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/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_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/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_71d3790f-be86-4ae5-9470-e8f61d75bda1/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 c74d906337e06c8dd2c0528b072883bb6b5dcc493fa945e0ee9e0dd423781a39 --- 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 02:10:24,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:10:24,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:10:24,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:10:24,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:10:24,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:10:24,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:10:24,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:10:24,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:10:24,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:10:24,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:10:24,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:10:24,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:10:24,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:10:24,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:10:24,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:10:24,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:10:24,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:10:24,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:10:24,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:10:24,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:10:24,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:10:24,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:10:24,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:10:24,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:10:24,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:10:24,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:10:24,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:10:24,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:10:24,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:10:24,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:10:24,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:10:24,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:10:24,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:10:24,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:10:24,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:10:24,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:10:24,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:10:24,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:10:24,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:10:24,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:10:24,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:10:24,696 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:10:24,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:10:24,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:10:24,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:10:24,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:10:24,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:10:24,700 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:10:24,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:10:24,701 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:10:24,701 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:10:24,703 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:10:24,703 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:10:24,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:10:24,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:10:24,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:10:24,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:10:24,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:10:24,706 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:10:24,707 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:10:24,707 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:10:24,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:10:24,708 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:10:24,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:10:24,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:10:24,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:10:24,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:10:24,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:24,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:10:24,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:10:24,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:10:24,710 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:10:24,710 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:24,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:10:24,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:10:24,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:10:24,712 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c74d906337e06c8dd2c0528b072883bb6b5dcc493fa945e0ee9e0dd423781a39 [2022-11-03 02:10:25,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:10:25,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:10:25,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:10:25,236 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:10:25,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:10:25,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:10:25,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/91569320a/7ca57a6e9c3349d7b7fba1574d4d283b/FLAGa4cab5847 [2022-11-03 02:10:26,308 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:10:26,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:10:26,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/91569320a/7ca57a6e9c3349d7b7fba1574d4d283b/FLAGa4cab5847 [2022-11-03 02:10:26,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/data/91569320a/7ca57a6e9c3349d7b7fba1574d4d283b [2022-11-03 02:10:26,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:10:26,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:10:26,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:26,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:10:26,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:10:26,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:26" (1/1) ... [2022-11-03 02:10:26,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b771585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:26, skipping insertion in model container [2022-11-03 02:10:26,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:10:26" (1/1) ... [2022-11-03 02:10:26,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:10:26,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:10:26,832 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c[1014,1027] [2022-11-03 02:10:27,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:27,421 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:10:27,431 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_71d3790f-be86-4ae5-9470-e8f61d75bda1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.bakery.8.prop1-func-interl.c[1014,1027] [2022-11-03 02:10:27,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:10:27,695 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:10:27,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27 WrapperNode [2022-11-03 02:10:27,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:10:27,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:27,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:10:27,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:10:27,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:27,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,017 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3137 [2022-11-03 02:10:28,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:10:28,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:10:28,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:10:28,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:10:28,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,207 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:10:28,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:10:28,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:10:28,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:10:28,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (1/1) ... [2022-11-03 02:10:28,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:10:28,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:28,371 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:10:28,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:10:28,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:10:28,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:10:29,383 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:10:29,396 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:10:32,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:10:32,499 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:10:32,500 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:10:32,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:32 BoogieIcfgContainer [2022-11-03 02:10:32,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:10:32,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:10:32,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:10:32,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:10:32,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:10:26" (1/3) ... [2022-11-03 02:10:32,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ea183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:32, skipping insertion in model container [2022-11-03 02:10:32,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:10:27" (2/3) ... [2022-11-03 02:10:32,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ea183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:10:32, skipping insertion in model container [2022-11-03 02:10:32,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:10:32" (3/3) ... [2022-11-03 02:10:32,515 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.bakery.8.prop1-func-interl.c [2022-11-03 02:10:32,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:10:32,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:10:32,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:10:32,623 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;@2776c5b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:10:32,623 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:10:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 209 states have (on average 1.4976076555023923) internal successors, (313), 210 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:32,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:32,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:32,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:32,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -761744867, now seen corresponding path program 1 times [2022-11-03 02:10:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:32,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211694061] [2022-11-03 02:10:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:32,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:32,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:32,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:32,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:10:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:10:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:33,573 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 02:10:33,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:33,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:33,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211694061] [2022-11-03 02:10:33,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211694061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:33,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:33,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:33,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621555198] [2022-11-03 02:10:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:33,644 INFO L87 Difference]: Start difference. First operand has 211 states, 209 states have (on average 1.4976076555023923) internal successors, (313), 210 states have internal predecessors, (313), 0 states have call successors, (0), 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 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:34,169 INFO L93 Difference]: Finished difference Result 825 states and 1235 transitions. [2022-11-03 02:10:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:34,192 INFO L225 Difference]: With dead ends: 825 [2022-11-03 02:10:34,193 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 02:10:34,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:10:34,201 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 907 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1207 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 02:10:34,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1207 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 02:10:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 209. [2022-11-03 02:10:34,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 208 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 309 transitions. [2022-11-03 02:10:34,296 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 309 transitions. Word has length 15 [2022-11-03 02:10:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:34,297 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 309 transitions. [2022-11-03 02:10:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 309 transitions. [2022-11-03 02:10:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:34,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:34,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:34,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:34,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:34,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash -503579429, now seen corresponding path program 1 times [2022-11-03 02:10:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749222325] [2022-11-03 02:10:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:34,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:34,521 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:34,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:10:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:10:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:35,315 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 02:10:35,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:35,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:35,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749222325] [2022-11-03 02:10:35,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749222325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:35,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:35,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:35,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500196192] [2022-11-03 02:10:35,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:35,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:35,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:35,320 INFO L87 Difference]: Start difference. First operand 209 states and 309 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:35,675 INFO L93 Difference]: Finished difference Result 821 states and 1219 transitions. [2022-11-03 02:10:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:35,681 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:10:35,681 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 02:10:35,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:10:35,684 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 901 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1206 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 02:10:35,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1206 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 02:10:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 211. [2022-11-03 02:10:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.480952380952381) internal successors, (311), 210 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 311 transitions. [2022-11-03 02:10:35,699 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 311 transitions. Word has length 15 [2022-11-03 02:10:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:35,699 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 311 transitions. [2022-11-03 02:10:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 311 transitions. [2022-11-03 02:10:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:35,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:35,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:35,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-03 02:10:35,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:35,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash -896606439, now seen corresponding path program 1 times [2022-11-03 02:10:35,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741504902] [2022-11-03 02:10:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:35,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:35,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:35,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:35,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:10:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:36,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:10:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:36,571 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 02:10:36,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:36,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741504902] [2022-11-03 02:10:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741504902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:36,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:36,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:36,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875992616] [2022-11-03 02:10:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:36,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:36,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:36,582 INFO L87 Difference]: Start difference. First operand 211 states and 311 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:36,949 INFO L93 Difference]: Finished difference Result 821 states and 1218 transitions. [2022-11-03 02:10:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:36,955 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:10:36,955 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 02:10:36,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:10:36,958 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 895 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1205 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 02:10:36,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1205 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 02:10:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 213. [2022-11-03 02:10:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4764150943396226) internal successors, (313), 212 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 313 transitions. [2022-11-03 02:10:36,973 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 313 transitions. Word has length 15 [2022-11-03 02:10:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:36,974 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 313 transitions. [2022-11-03 02:10:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 313 transitions. [2022-11-03 02:10:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:36,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:36,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:37,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1705953065, now seen corresponding path program 1 times [2022-11-03 02:10:37,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:37,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166422621] [2022-11-03 02:10:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:37,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:37,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:37,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:37,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:10:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:10:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:37,874 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 02:10:37,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:37,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:37,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166422621] [2022-11-03 02:10:37,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166422621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:37,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:37,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698454832] [2022-11-03 02:10:37,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:37,878 INFO L87 Difference]: Start difference. First operand 213 states and 313 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:38,213 INFO L93 Difference]: Finished difference Result 821 states and 1217 transitions. [2022-11-03 02:10:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:38,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:38,219 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:10:38,219 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 02:10:38,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:10:38,221 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 889 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1204 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 02:10:38,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 1204 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 02:10:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 215. [2022-11-03 02:10:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.47196261682243) internal successors, (315), 214 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 315 transitions. [2022-11-03 02:10:38,233 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 315 transitions. Word has length 15 [2022-11-03 02:10:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:38,234 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 315 transitions. [2022-11-03 02:10:38,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 315 transitions. [2022-11-03 02:10:38,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:38,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:38,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:38,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:38,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:38,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:38,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1648694763, now seen corresponding path program 1 times [2022-11-03 02:10:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:38,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977979650] [2022-11-03 02:10:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:38,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:10:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:10:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:39,162 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 02:10:39,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:39,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:39,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977979650] [2022-11-03 02:10:39,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977979650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:39,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:39,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634747229] [2022-11-03 02:10:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:39,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:39,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:39,166 INFO L87 Difference]: Start difference. First operand 215 states and 315 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:39,443 INFO L93 Difference]: Finished difference Result 821 states and 1216 transitions. [2022-11-03 02:10:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:39,451 INFO L225 Difference]: With dead ends: 821 [2022-11-03 02:10:39,451 INFO L226 Difference]: Without dead ends: 616 [2022-11-03 02:10:39,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:10:39,453 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 883 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:39,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1206 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:10:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-11-03 02:10:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 217. [2022-11-03 02:10:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4675925925925926) internal successors, (317), 216 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 317 transitions. [2022-11-03 02:10:39,464 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 317 transitions. Word has length 15 [2022-11-03 02:10:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:39,464 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 317 transitions. [2022-11-03 02:10:39,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 317 transitions. [2022-11-03 02:10:39,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:10:39,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:39,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:39,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:39,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:39,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1648635181, now seen corresponding path program 1 times [2022-11-03 02:10:39,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:39,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840185469] [2022-11-03 02:10:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:39,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:39,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:39,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:39,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:10:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 02:10:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:40,988 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 02:10:40,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:40,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:40,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840185469] [2022-11-03 02:10:40,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840185469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:40,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:40,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-03 02:10:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142762592] [2022-11-03 02:10:40,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:40,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:10:40,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:40,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:10:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:10:40,993 INFO L87 Difference]: Start difference. First operand 217 states and 317 transitions. Second operand has 14 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:46,179 INFO L93 Difference]: Finished difference Result 1302 states and 1922 transitions. [2022-11-03 02:10:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 02:10:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-03 02:10:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:46,186 INFO L225 Difference]: With dead ends: 1302 [2022-11-03 02:10:46,186 INFO L226 Difference]: Without dead ends: 1300 [2022-11-03 02:10:46,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:10:46,190 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 3298 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3298 SdHoareTripleChecker+Valid, 6228 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:46,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3298 Valid, 6228 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:10:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-03 02:10:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 227. [2022-11-03 02:10:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.4646017699115044) internal successors, (331), 226 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 331 transitions. [2022-11-03 02:10:46,226 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 331 transitions. Word has length 15 [2022-11-03 02:10:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:46,227 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 331 transitions. [2022-11-03 02:10:46,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 331 transitions. [2022-11-03 02:10:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:46,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:46,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:46,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-03 02:10:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:46,459 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:46,460 INFO L85 PathProgramCache]: Analyzing trace with hash -939818967, now seen corresponding path program 1 times [2022-11-03 02:10:46,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:46,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812307278] [2022-11-03 02:10:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:46,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:46,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:10:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:48,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:48,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:48,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812307278] [2022-11-03 02:10:48,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812307278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:48,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:48,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:10:48,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113515584] [2022-11-03 02:10:48,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:48,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:10:48,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:10:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:10:48,675 INFO L87 Difference]: Start difference. First operand 227 states and 331 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:10:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:49,007 INFO L93 Difference]: Finished difference Result 849 states and 1255 transitions. [2022-11-03 02:10:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:10:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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) Word has length 218 [2022-11-03 02:10:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:49,016 INFO L225 Difference]: With dead ends: 849 [2022-11-03 02:10:49,016 INFO L226 Difference]: Without dead ends: 634 [2022-11-03 02:10:49,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 02:10:49,022 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 745 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:49,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1189 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-03 02:10:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 281. [2022-11-03 02:10:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.4642857142857142) internal successors, (410), 280 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 410 transitions. [2022-11-03 02:10:49,044 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 410 transitions. Word has length 218 [2022-11-03 02:10:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:49,047 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 410 transitions. [2022-11-03 02:10:49,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:10:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 410 transitions. [2022-11-03 02:10:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:49,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:49,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:49,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:49,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:49,287 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1949956651, now seen corresponding path program 1 times [2022-11-03 02:10:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:49,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854419611] [2022-11-03 02:10:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:49,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:49,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:10:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:51,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:51,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:51,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854419611] [2022-11-03 02:10:51,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854419611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:51,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:51,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096472656] [2022-11-03 02:10:51,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:51,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:51,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:51,311 INFO L87 Difference]: Start difference. First operand 281 states and 410 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:51,646 INFO L93 Difference]: Finished difference Result 924 states and 1363 transitions. [2022-11-03 02:10:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:10:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:51,650 INFO L225 Difference]: With dead ends: 924 [2022-11-03 02:10:51,650 INFO L226 Difference]: Without dead ends: 709 [2022-11-03 02:10:51,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:10:51,652 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1137 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:51,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 1785 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-03 02:10:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 283. [2022-11-03 02:10:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4609929078014185) internal successors, (412), 282 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 412 transitions. [2022-11-03 02:10:51,664 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 412 transitions. Word has length 218 [2022-11-03 02:10:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:51,665 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 412 transitions. [2022-11-03 02:10:51,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:51,665 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 412 transitions. [2022-11-03 02:10:51,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:51,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:51,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:51,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:51,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -898429779, now seen corresponding path program 1 times [2022-11-03 02:10:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532223627] [2022-11-03 02:10:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:51,886 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:51,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:10:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:53,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:53,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532223627] [2022-11-03 02:10:53,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532223627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:53,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:53,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:53,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008598825] [2022-11-03 02:10:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:53,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:53,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:53,688 INFO L87 Difference]: Start difference. First operand 283 states and 412 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:54,042 INFO L93 Difference]: Finished difference Result 924 states and 1362 transitions. [2022-11-03 02:10:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:10:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:54,047 INFO L225 Difference]: With dead ends: 924 [2022-11-03 02:10:54,047 INFO L226 Difference]: Without dead ends: 709 [2022-11-03 02:10:54,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:10:54,049 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1130 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:54,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1130 Valid, 1761 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:10:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-03 02:10:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 285. [2022-11-03 02:10:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4577464788732395) internal successors, (414), 284 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 414 transitions. [2022-11-03 02:10:54,063 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 414 transitions. Word has length 218 [2022-11-03 02:10:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:54,064 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 414 transitions. [2022-11-03 02:10:54,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 414 transitions. [2022-11-03 02:10:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:54,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:54,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:54,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:54,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:54,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash -512567377, now seen corresponding path program 1 times [2022-11-03 02:10:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:54,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522655256] [2022-11-03 02:10:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:54,296 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:54,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:10:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:10:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:56,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:56,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522655256] [2022-11-03 02:10:56,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522655256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:56,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:56,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:10:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127339242] [2022-11-03 02:10:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:56,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:10:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:10:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:10:56,042 INFO L87 Difference]: Start difference. First operand 285 states and 414 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:56,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:56,728 INFO L93 Difference]: Finished difference Result 716 states and 1053 transitions. [2022-11-03 02:10:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:10:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:10:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:56,740 INFO L225 Difference]: With dead ends: 716 [2022-11-03 02:10:56,740 INFO L226 Difference]: Without dead ends: 501 [2022-11-03 02:10:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:10:56,743 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 827 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:56,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 1213 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:10:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-03 02:10:56,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 287. [2022-11-03 02:10:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.4545454545454546) internal successors, (416), 286 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 416 transitions. [2022-11-03 02:10:56,756 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 416 transitions. Word has length 218 [2022-11-03 02:10:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:56,757 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 416 transitions. [2022-11-03 02:10:56,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:10:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 416 transitions. [2022-11-03 02:10:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:56,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:56,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:56,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:56,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:56,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1851274285, now seen corresponding path program 1 times [2022-11-03 02:10:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:56,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183027856] [2022-11-03 02:10:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:56,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:56,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:56,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:57,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:10:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:58,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:10:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:10:58,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:10:58,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:58,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183027856] [2022-11-03 02:10:58,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183027856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:58,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:58,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:10:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923318603] [2022-11-03 02:10:58,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:58,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:10:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:58,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:10:58,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:10:58,821 INFO L87 Difference]: Start difference. First operand 287 states and 416 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:10:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:59,360 INFO L93 Difference]: Finished difference Result 900 states and 1323 transitions. [2022-11-03 02:10:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:10:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:10:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:59,363 INFO L225 Difference]: With dead ends: 900 [2022-11-03 02:10:59,364 INFO L226 Difference]: Without dead ends: 685 [2022-11-03 02:10:59,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:10:59,365 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 767 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:59,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 2523 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2022-11-03 02:10:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-03 02:10:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 349. [2022-11-03 02:10:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4482758620689655) internal successors, (504), 348 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 504 transitions. [2022-11-03 02:10:59,380 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 504 transitions. Word has length 218 [2022-11-03 02:10:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:59,381 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 504 transitions. [2022-11-03 02:10:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:10:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 504 transitions. [2022-11-03 02:10:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:10:59,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:59,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:59,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:10:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:10:59,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1044739409, now seen corresponding path program 1 times [2022-11-03 02:10:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:10:59,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392158753] [2022-11-03 02:10:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:59,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:10:59,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:10:59,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:10:59,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:11:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:01,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:01,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:01,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:01,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392158753] [2022-11-03 02:11:01,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392158753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:01,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:01,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945282969] [2022-11-03 02:11:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:01,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:01,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:01,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:01,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:01,720 INFO L87 Difference]: Start difference. First operand 349 states and 504 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:02,004 INFO L93 Difference]: Finished difference Result 911 states and 1339 transitions. [2022-11-03 02:11:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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) Word has length 218 [2022-11-03 02:11:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:02,010 INFO L225 Difference]: With dead ends: 911 [2022-11-03 02:11:02,010 INFO L226 Difference]: Without dead ends: 696 [2022-11-03 02:11:02,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 02:11:02,012 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 686 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:02,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1185 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:02,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-03 02:11:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 365. [2022-11-03 02:11:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.4478021978021978) internal successors, (527), 364 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 527 transitions. [2022-11-03 02:11:02,026 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 527 transitions. Word has length 218 [2022-11-03 02:11:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:02,027 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 527 transitions. [2022-11-03 02:11:02,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 527 transitions. [2022-11-03 02:11:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:02,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:02,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:02,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:02,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:02,258 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1589611983, now seen corresponding path program 1 times [2022-11-03 02:11:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316121109] [2022-11-03 02:11:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:02,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:02,265 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:02,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:11:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:04,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:04,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316121109] [2022-11-03 02:11:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316121109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:04,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:04,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982595687] [2022-11-03 02:11:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:04,260 INFO L87 Difference]: Start difference. First operand 365 states and 527 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:04,534 INFO L93 Difference]: Finished difference Result 1008 states and 1480 transitions. [2022-11-03 02:11:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:04,538 INFO L225 Difference]: With dead ends: 1008 [2022-11-03 02:11:04,538 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 02:11:04,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:04,540 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 1111 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:04,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 1780 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 02:11:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 367. [2022-11-03 02:11:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.4453551912568305) internal successors, (529), 366 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 529 transitions. [2022-11-03 02:11:04,557 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 529 transitions. Word has length 218 [2022-11-03 02:11:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:04,557 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 529 transitions. [2022-11-03 02:11:04,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 529 transitions. [2022-11-03 02:11:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:04,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:04,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:04,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:04,786 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:04,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1757303347, now seen corresponding path program 1 times [2022-11-03 02:11:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:04,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18731496] [2022-11-03 02:11:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:04,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:04,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:04,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:04,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:11:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:06,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:06,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:06,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18731496] [2022-11-03 02:11:06,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18731496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:06,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:06,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:06,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350100015] [2022-11-03 02:11:06,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:06,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:06,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:06,496 INFO L87 Difference]: Start difference. First operand 367 states and 529 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:06,866 INFO L93 Difference]: Finished difference Result 1008 states and 1479 transitions. [2022-11-03 02:11:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:06,870 INFO L225 Difference]: With dead ends: 1008 [2022-11-03 02:11:06,871 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 02:11:06,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:06,872 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 1104 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:06,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 1756 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:11:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 02:11:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 369. [2022-11-03 02:11:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.4429347826086956) internal successors, (531), 368 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 531 transitions. [2022-11-03 02:11:06,886 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 531 transitions. Word has length 218 [2022-11-03 02:11:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:06,887 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 531 transitions. [2022-11-03 02:11:06,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 531 transitions. [2022-11-03 02:11:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:06,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:06,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:06,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:07,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1322797749, now seen corresponding path program 1 times [2022-11-03 02:11:07,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:07,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933400677] [2022-11-03 02:11:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:07,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:07,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:07,113 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:11:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:08,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:08,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:08,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:08,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933400677] [2022-11-03 02:11:08,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933400677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:08,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:08,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259231994] [2022-11-03 02:11:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:08,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:08,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:08,988 INFO L87 Difference]: Start difference. First operand 369 states and 531 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:09,270 INFO L93 Difference]: Finished difference Result 911 states and 1336 transitions. [2022-11-03 02:11:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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) Word has length 218 [2022-11-03 02:11:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:09,277 INFO L225 Difference]: With dead ends: 911 [2022-11-03 02:11:09,277 INFO L226 Difference]: Without dead ends: 696 [2022-11-03 02:11:09,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 02:11:09,281 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 628 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:09,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1182 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:11:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-03 02:11:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 387. [2022-11-03 02:11:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.4430051813471503) internal successors, (557), 386 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 557 transitions. [2022-11-03 02:11:09,297 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 557 transitions. Word has length 218 [2022-11-03 02:11:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:09,299 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 557 transitions. [2022-11-03 02:11:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 557 transitions. [2022-11-03 02:11:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:09,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:09,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:09,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:09,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash 284213175, now seen corresponding path program 1 times [2022-11-03 02:11:09,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:09,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110225745] [2022-11-03 02:11:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:09,530 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:09,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:11:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:10,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:11,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:11,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:11,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110225745] [2022-11-03 02:11:11,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110225745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:11,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:11,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905026153] [2022-11-03 02:11:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:11,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:11,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:11,595 INFO L87 Difference]: Start difference. First operand 387 states and 557 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:11,893 INFO L93 Difference]: Finished difference Result 1030 states and 1510 transitions. [2022-11-03 02:11:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:11,898 INFO L225 Difference]: With dead ends: 1030 [2022-11-03 02:11:11,898 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 02:11:11,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:11,902 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1086 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:11,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 1776 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 02:11:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 389. [2022-11-03 02:11:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.440721649484536) internal successors, (559), 388 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 02:11:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 559 transitions. [2022-11-03 02:11:11,926 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 559 transitions. Word has length 218 [2022-11-03 02:11:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:11,926 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 559 transitions. [2022-11-03 02:11:11,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 559 transitions. [2022-11-03 02:11:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:11,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:11,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:11,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:12,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:12,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1857647303, now seen corresponding path program 1 times [2022-11-03 02:11:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:12,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276676451] [2022-11-03 02:11:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:12,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:12,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:12,148 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:12,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:11:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:14,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:14,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276676451] [2022-11-03 02:11:14,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276676451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:14,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:14,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322164858] [2022-11-03 02:11:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:14,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:14,212 INFO L87 Difference]: Start difference. First operand 389 states and 559 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:14,531 INFO L93 Difference]: Finished difference Result 1030 states and 1509 transitions. [2022-11-03 02:11:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:14,536 INFO L225 Difference]: With dead ends: 1030 [2022-11-03 02:11:14,536 INFO L226 Difference]: Without dead ends: 815 [2022-11-03 02:11:14,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:14,538 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 1079 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:14,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1752 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-03 02:11:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 391. [2022-11-03 02:11:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4384615384615385) internal successors, (561), 390 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 02:11:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 561 transitions. [2022-11-03 02:11:14,555 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 561 transitions. Word has length 218 [2022-11-03 02:11:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 561 transitions. [2022-11-03 02:11:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 561 transitions. [2022-11-03 02:11:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:14,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:14,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:14,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,782 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:14,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1739205829, now seen corresponding path program 1 times [2022-11-03 02:11:14,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:14,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163859003] [2022-11-03 02:11:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:14,786 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:14,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:11:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:11:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:17,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:17,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163859003] [2022-11-03 02:11:17,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163859003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:17,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:17,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:11:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255774336] [2022-11-03 02:11:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:17,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:11:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:11:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:17,115 INFO L87 Difference]: Start difference. First operand 391 states and 561 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:11:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:17,407 INFO L93 Difference]: Finished difference Result 760 states and 1096 transitions. [2022-11-03 02:11:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:11:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:11:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:17,411 INFO L225 Difference]: With dead ends: 760 [2022-11-03 02:11:17,411 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:11:17,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:11:17,413 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 177 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:17,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1355 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-11-03 02:11:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:11:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2022-11-03 02:11:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.4264705882352942) internal successors, (776), 544 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 776 transitions. [2022-11-03 02:11:17,429 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 776 transitions. Word has length 218 [2022-11-03 02:11:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:17,430 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 776 transitions. [2022-11-03 02:11:17,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:11:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 776 transitions. [2022-11-03 02:11:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:17,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:17,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:17,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:17,646 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash -432063431, now seen corresponding path program 1 times [2022-11-03 02:11:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:17,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916395362] [2022-11-03 02:11:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:17,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:17,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:17,651 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:17,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:11:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:19,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:19,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916395362] [2022-11-03 02:11:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916395362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:19,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:19,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105381686] [2022-11-03 02:11:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:19,749 INFO L87 Difference]: Start difference. First operand 545 states and 776 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:19,978 INFO L93 Difference]: Finished difference Result 1065 states and 1548 transitions. [2022-11-03 02:11:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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) Word has length 218 [2022-11-03 02:11:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:19,985 INFO L225 Difference]: With dead ends: 1065 [2022-11-03 02:11:19,985 INFO L226 Difference]: Without dead ends: 850 [2022-11-03 02:11:19,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 02:11:19,987 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 570 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:19,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1179 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-03 02:11:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 563. [2022-11-03 02:11:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.4270462633451957) internal successors, (802), 562 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 802 transitions. [2022-11-03 02:11:20,005 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 802 transitions. Word has length 218 [2022-11-03 02:11:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:20,006 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 802 transitions. [2022-11-03 02:11:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 802 transitions. [2022-11-03 02:11:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:20,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:20,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:20,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:20,215 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1018339653, now seen corresponding path program 1 times [2022-11-03 02:11:20,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:20,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662261033] [2022-11-03 02:11:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:20,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:20,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:20,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:20,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:11:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:22,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:22,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:22,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662261033] [2022-11-03 02:11:22,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662261033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:22,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:22,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004526087] [2022-11-03 02:11:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:22,364 INFO L87 Difference]: Start difference. First operand 563 states and 802 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:22,666 INFO L93 Difference]: Finished difference Result 1206 states and 1755 transitions. [2022-11-03 02:11:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:22,672 INFO L225 Difference]: With dead ends: 1206 [2022-11-03 02:11:22,672 INFO L226 Difference]: Without dead ends: 991 [2022-11-03 02:11:22,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:22,674 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 1061 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1772 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-11-03 02:11:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 565. [2022-11-03 02:11:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.425531914893617) internal successors, (804), 564 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 804 transitions. [2022-11-03 02:11:22,698 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 804 transitions. Word has length 218 [2022-11-03 02:11:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:22,699 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 804 transitions. [2022-11-03 02:11:22,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 804 transitions. [2022-11-03 02:11:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:22,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:22,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:22,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:22,918 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash 858143165, now seen corresponding path program 1 times [2022-11-03 02:11:22,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:22,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490295758] [2022-11-03 02:11:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:22,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:22,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:22,923 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:11:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:11:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:25,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:25,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:25,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490295758] [2022-11-03 02:11:25,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490295758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:25,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:25,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:11:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951090869] [2022-11-03 02:11:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:11:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:11:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:11:25,228 INFO L87 Difference]: Start difference. First operand 565 states and 804 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:11:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:25,498 INFO L93 Difference]: Finished difference Result 1080 states and 1540 transitions. [2022-11-03 02:11:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:11:25,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:11:25,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:25,503 INFO L225 Difference]: With dead ends: 1080 [2022-11-03 02:11:25,504 INFO L226 Difference]: Without dead ends: 865 [2022-11-03 02:11:25,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:11:25,506 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 222 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:25,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1415 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-11-03 02:11:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-03 02:11:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-03 02:11:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.412037037037037) internal successors, (1220), 864 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1220 transitions. [2022-11-03 02:11:25,531 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1220 transitions. Word has length 218 [2022-11-03 02:11:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:25,532 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1220 transitions. [2022-11-03 02:11:25,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:11:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1220 transitions. [2022-11-03 02:11:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:25,536 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:25,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:25,762 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1350769339, now seen corresponding path program 1 times [2022-11-03 02:11:25,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:25,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134982148] [2022-11-03 02:11:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:25,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:25,767 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:25,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:11:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:27,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:28,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:28,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:28,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134982148] [2022-11-03 02:11:28,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134982148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:28,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:28,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:28,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676209283] [2022-11-03 02:11:28,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:28,034 INFO L87 Difference]: Start difference. First operand 865 states and 1220 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:28,273 INFO L93 Difference]: Finished difference Result 1365 states and 1962 transitions. [2022-11-03 02:11:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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) Word has length 218 [2022-11-03 02:11:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:28,283 INFO L225 Difference]: With dead ends: 1365 [2022-11-03 02:11:28,284 INFO L226 Difference]: Without dead ends: 1150 [2022-11-03 02:11:28,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 02:11:28,286 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 513 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:28,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1177 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-03 02:11:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 885. [2022-11-03 02:11:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.41289592760181) internal successors, (1249), 884 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1249 transitions. [2022-11-03 02:11:28,314 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1249 transitions. Word has length 218 [2022-11-03 02:11:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1249 transitions. [2022-11-03 02:11:28,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 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 02:11:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1249 transitions. [2022-11-03 02:11:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:28,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:28,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:28,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:28,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash -335410499, now seen corresponding path program 1 times [2022-11-03 02:11:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431879993] [2022-11-03 02:11:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:28,536 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:28,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:11:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:29,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:30,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:30,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431879993] [2022-11-03 02:11:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431879993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:30,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:30,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639047954] [2022-11-03 02:11:30,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:30,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:30,664 INFO L87 Difference]: Start difference. First operand 885 states and 1249 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:30,948 INFO L93 Difference]: Finished difference Result 1528 states and 2202 transitions. [2022-11-03 02:11:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:30,953 INFO L225 Difference]: With dead ends: 1528 [2022-11-03 02:11:30,953 INFO L226 Difference]: Without dead ends: 1313 [2022-11-03 02:11:30,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:30,955 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1037 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:30,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1769 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-11-03 02:11:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 887. [2022-11-03 02:11:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.4119638826185101) internal successors, (1251), 886 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1251 transitions. [2022-11-03 02:11:30,982 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1251 transitions. Word has length 218 [2022-11-03 02:11:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:30,983 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1251 transitions. [2022-11-03 02:11:30,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1251 transitions. [2022-11-03 02:11:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:30,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:30,986 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:31,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:31,210 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash -752807105, now seen corresponding path program 1 times [2022-11-03 02:11:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:31,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366568654] [2022-11-03 02:11:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:31,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:31,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:31,214 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:31,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:11:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:33,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:33,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366568654] [2022-11-03 02:11:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366568654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:33,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:33,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802633063] [2022-11-03 02:11:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:33,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:33,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:33,305 INFO L87 Difference]: Start difference. First operand 887 states and 1251 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:33,601 INFO L93 Difference]: Finished difference Result 1528 states and 2201 transitions. [2022-11-03 02:11:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:33,607 INFO L225 Difference]: With dead ends: 1528 [2022-11-03 02:11:33,607 INFO L226 Difference]: Without dead ends: 1313 [2022-11-03 02:11:33,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:33,609 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 1030 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:33,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1745 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-11-03 02:11:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 889. [2022-11-03 02:11:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.4110360360360361) internal successors, (1253), 888 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1253 transitions. [2022-11-03 02:11:33,639 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1253 transitions. Word has length 218 [2022-11-03 02:11:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:33,640 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1253 transitions. [2022-11-03 02:11:33,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1253 transitions. [2022-11-03 02:11:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:33,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:33,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:33,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:33,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:33,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1208767553, now seen corresponding path program 1 times [2022-11-03 02:11:33,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:33,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578692221] [2022-11-03 02:11:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:33,876 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:33,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:11:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:35,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:35,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578692221] [2022-11-03 02:11:35,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578692221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:35,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:35,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307203104] [2022-11-03 02:11:35,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:35,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:35,822 INFO L87 Difference]: Start difference. First operand 889 states and 1253 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:36,100 INFO L93 Difference]: Finished difference Result 1440 states and 2068 transitions. [2022-11-03 02:11:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:36,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:36,103 INFO L225 Difference]: With dead ends: 1440 [2022-11-03 02:11:36,103 INFO L226 Difference]: Without dead ends: 1225 [2022-11-03 02:11:36,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:36,105 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 864 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:36,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1629 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-03 02:11:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 897. [2022-11-03 02:11:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 1.4107142857142858) internal successors, (1264), 896 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1264 transitions. [2022-11-03 02:11:36,130 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1264 transitions. Word has length 218 [2022-11-03 02:11:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:36,131 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1264 transitions. [2022-11-03 02:11:36,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1264 transitions. [2022-11-03 02:11:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:36,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:36,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:36,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:36,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:36,350 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1652668227, now seen corresponding path program 1 times [2022-11-03 02:11:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154775044] [2022-11-03 02:11:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:36,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:36,354 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:36,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:11:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:37,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:38,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:38,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:38,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154775044] [2022-11-03 02:11:38,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154775044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:38,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:38,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319760658] [2022-11-03 02:11:38,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:38,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:38,181 INFO L87 Difference]: Start difference. First operand 897 states and 1264 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:38,510 INFO L93 Difference]: Finished difference Result 1440 states and 2067 transitions. [2022-11-03 02:11:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:38,515 INFO L225 Difference]: With dead ends: 1440 [2022-11-03 02:11:38,516 INFO L226 Difference]: Without dead ends: 1225 [2022-11-03 02:11:38,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:38,517 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 852 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:38,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1597 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:11:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-03 02:11:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 901. [2022-11-03 02:11:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.41) internal successors, (1269), 900 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1269 transitions. [2022-11-03 02:11:38,542 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1269 transitions. Word has length 218 [2022-11-03 02:11:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:38,543 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1269 transitions. [2022-11-03 02:11:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1269 transitions. [2022-11-03 02:11:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:38,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:38,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:38,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 02:11:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:38,774 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1637149509, now seen corresponding path program 1 times [2022-11-03 02:11:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:38,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078482814] [2022-11-03 02:11:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:38,779 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:38,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:11:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:40,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:40,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:40,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:40,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078482814] [2022-11-03 02:11:40,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078482814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:40,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:40,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:40,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542218540] [2022-11-03 02:11:40,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:40,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:40,705 INFO L87 Difference]: Start difference. First operand 901 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:40,971 INFO L93 Difference]: Finished difference Result 1462 states and 2099 transitions. [2022-11-03 02:11:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:40,975 INFO L225 Difference]: With dead ends: 1462 [2022-11-03 02:11:40,975 INFO L226 Difference]: Without dead ends: 1247 [2022-11-03 02:11:40,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:40,976 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 877 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:40,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 1647 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-11-03 02:11:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 905. [2022-11-03 02:11:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.4092920353982301) internal successors, (1274), 904 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1274 transitions. [2022-11-03 02:11:41,000 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1274 transitions. Word has length 218 [2022-11-03 02:11:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:41,001 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1274 transitions. [2022-11-03 02:11:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1274 transitions. [2022-11-03 02:11:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:41,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:41,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:41,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:41,230 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1764331449, now seen corresponding path program 1 times [2022-11-03 02:11:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:41,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592394948] [2022-11-03 02:11:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:41,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:41,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:41,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:11:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:43,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:43,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592394948] [2022-11-03 02:11:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592394948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:43,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:43,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801176662] [2022-11-03 02:11:43,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:43,300 INFO L87 Difference]: Start difference. First operand 905 states and 1274 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:43,552 INFO L93 Difference]: Finished difference Result 1462 states and 2098 transitions. [2022-11-03 02:11:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:43,553 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:43,556 INFO L225 Difference]: With dead ends: 1462 [2022-11-03 02:11:43,556 INFO L226 Difference]: Without dead ends: 1247 [2022-11-03 02:11:43,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:43,558 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 870 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:43,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1638 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:43,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-11-03 02:11:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 907. [2022-11-03 02:11:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.4083885209713025) internal successors, (1276), 906 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1276 transitions. [2022-11-03 02:11:43,581 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1276 transitions. Word has length 218 [2022-11-03 02:11:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:43,582 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1276 transitions. [2022-11-03 02:11:43,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1276 transitions. [2022-11-03 02:11:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:43,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:43,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:43,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:43,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:43,811 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1633242569, now seen corresponding path program 1 times [2022-11-03 02:11:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:43,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261041542] [2022-11-03 02:11:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:43,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:43,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:43,816 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:43,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:11:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:46,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:46,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261041542] [2022-11-03 02:11:46,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261041542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:46,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:46,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430464103] [2022-11-03 02:11:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:46,020 INFO L87 Difference]: Start difference. First operand 907 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:46,329 INFO L93 Difference]: Finished difference Result 1462 states and 2097 transitions. [2022-11-03 02:11:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:46,335 INFO L225 Difference]: With dead ends: 1462 [2022-11-03 02:11:46,335 INFO L226 Difference]: Without dead ends: 1247 [2022-11-03 02:11:46,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:46,336 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 863 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:46,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1614 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-11-03 02:11:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 909. [2022-11-03 02:11:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.407488986784141) internal successors, (1278), 908 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1278 transitions. [2022-11-03 02:11:46,359 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1278 transitions. Word has length 218 [2022-11-03 02:11:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:46,360 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1278 transitions. [2022-11-03 02:11:46,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1278 transitions. [2022-11-03 02:11:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:46,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:46,363 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:46,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:46,586 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2056889291, now seen corresponding path program 1 times [2022-11-03 02:11:46,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:46,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180107630] [2022-11-03 02:11:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:46,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:46,591 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:46,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:11:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:48,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:48,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:48,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:48,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180107630] [2022-11-03 02:11:48,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180107630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:48,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:48,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:48,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345051978] [2022-11-03 02:11:48,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:48,874 INFO L87 Difference]: Start difference. First operand 909 states and 1278 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:49,180 INFO L93 Difference]: Finished difference Result 1484 states and 2129 transitions. [2022-11-03 02:11:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:49,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:49,186 INFO L225 Difference]: With dead ends: 1484 [2022-11-03 02:11:49,186 INFO L226 Difference]: Without dead ends: 1269 [2022-11-03 02:11:49,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:49,188 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 882 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:49,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 1656 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-11-03 02:11:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 915. [2022-11-03 02:11:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 1.4070021881838075) internal successors, (1286), 914 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1286 transitions. [2022-11-03 02:11:49,213 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1286 transitions. Word has length 218 [2022-11-03 02:11:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1286 transitions. [2022-11-03 02:11:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1286 transitions. [2022-11-03 02:11:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:49,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:49,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:49,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:49,435 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1212883789, now seen corresponding path program 1 times [2022-11-03 02:11:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879426060] [2022-11-03 02:11:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:49,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:49,439 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:11:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:51,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:51,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:51,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879426060] [2022-11-03 02:11:51,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879426060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:51,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:51,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974091938] [2022-11-03 02:11:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:51,725 INFO L87 Difference]: Start difference. First operand 915 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:52,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:52,077 INFO L93 Difference]: Finished difference Result 1484 states and 2128 transitions. [2022-11-03 02:11:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:52,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:52,081 INFO L225 Difference]: With dead ends: 1484 [2022-11-03 02:11:52,082 INFO L226 Difference]: Without dead ends: 1269 [2022-11-03 02:11:52,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:52,084 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 875 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:52,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 1632 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:11:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2022-11-03 02:11:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 917. [2022-11-03 02:11:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.4061135371179039) internal successors, (1288), 916 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1288 transitions. [2022-11-03 02:11:52,110 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1288 transitions. Word has length 218 [2022-11-03 02:11:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:52,111 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1288 transitions. [2022-11-03 02:11:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1288 transitions. [2022-11-03 02:11:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:52,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:52,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:52,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:52,339 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:52,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1140497231, now seen corresponding path program 1 times [2022-11-03 02:11:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:52,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806201149] [2022-11-03 02:11:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:52,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:52,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:52,345 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:52,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:11:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:53,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:54,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:54,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806201149] [2022-11-03 02:11:54,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806201149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:54,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:54,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243232803] [2022-11-03 02:11:54,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:54,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:54,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:54,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:54,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:54,667 INFO L87 Difference]: Start difference. First operand 917 states and 1288 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:54,969 INFO L93 Difference]: Finished difference Result 1506 states and 2160 transitions. [2022-11-03 02:11:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:54,973 INFO L225 Difference]: With dead ends: 1506 [2022-11-03 02:11:54,973 INFO L226 Difference]: Without dead ends: 1291 [2022-11-03 02:11:54,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:54,975 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 899 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:54,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1682 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-11-03 02:11:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 921. [2022-11-03 02:11:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.4054347826086957) internal successors, (1293), 920 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1293 transitions. [2022-11-03 02:11:55,001 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1293 transitions. Word has length 218 [2022-11-03 02:11:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:55,002 INFO L495 AbstractCegarLoop]: Abstraction has 921 states and 1293 transitions. [2022-11-03 02:11:55,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1293 transitions. [2022-11-03 02:11:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:55,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:55,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:55,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:55,222 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1768266671, now seen corresponding path program 1 times [2022-11-03 02:11:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810576201] [2022-11-03 02:11:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:55,228 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:11:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:11:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:11:57,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:11:57,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:11:57,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810576201] [2022-11-03 02:11:57,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810576201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:57,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:57,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:11:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149787485] [2022-11-03 02:11:57,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:11:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:11:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:11:57,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:11:57,407 INFO L87 Difference]: Start difference. First operand 921 states and 1293 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:57,699 INFO L93 Difference]: Finished difference Result 1506 states and 2159 transitions. [2022-11-03 02:11:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:11:57,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:11:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:57,702 INFO L225 Difference]: With dead ends: 1506 [2022-11-03 02:11:57,703 INFO L226 Difference]: Without dead ends: 1291 [2022-11-03 02:11:57,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:11:57,705 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 892 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:57,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 1673 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:11:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-11-03 02:11:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 923. [2022-11-03 02:11:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.4045553145336225) internal successors, (1295), 922 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:11:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1295 transitions. [2022-11-03 02:11:57,729 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1295 transitions. Word has length 218 [2022-11-03 02:11:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:57,730 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1295 transitions. [2022-11-03 02:11:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:11:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1295 transitions. [2022-11-03 02:11:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:11:57,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:57,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:57,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:11:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:11:57,958 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 154961363, now seen corresponding path program 1 times [2022-11-03 02:11:57,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:11:57,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401321618] [2022-11-03 02:11:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:11:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:11:57,963 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:11:57,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 02:11:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:11:59,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:00,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:00,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:00,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401321618] [2022-11-03 02:12:00,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401321618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:00,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:00,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:00,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756330089] [2022-11-03 02:12:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:00,194 INFO L87 Difference]: Start difference. First operand 923 states and 1295 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:00,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:00,518 INFO L93 Difference]: Finished difference Result 1506 states and 2158 transitions. [2022-11-03 02:12:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:12:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:12:00,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:00,521 INFO L225 Difference]: With dead ends: 1506 [2022-11-03 02:12:00,521 INFO L226 Difference]: Without dead ends: 1291 [2022-11-03 02:12:00,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:12:00,523 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 885 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:00,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1649 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:12:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-11-03 02:12:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 925. [2022-11-03 02:12:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.4036796536796536) internal successors, (1297), 924 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1297 transitions. [2022-11-03 02:12:00,549 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1297 transitions. Word has length 218 [2022-11-03 02:12:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:00,549 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1297 transitions. [2022-11-03 02:12:00,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1297 transitions. [2022-11-03 02:12:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:00,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:00,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:00,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:00,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:00,766 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 295509973, now seen corresponding path program 1 times [2022-11-03 02:12:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145622482] [2022-11-03 02:12:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:00,773 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:00,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:12:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:12:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:02,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:02,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145622482] [2022-11-03 02:12:02,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145622482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:02,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:02,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:02,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72675417] [2022-11-03 02:12:02,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:02,996 INFO L87 Difference]: Start difference. First operand 925 states and 1297 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:03,294 INFO L93 Difference]: Finished difference Result 1528 states and 2190 transitions. [2022-11-03 02:12:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:12:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:12:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:03,298 INFO L225 Difference]: With dead ends: 1528 [2022-11-03 02:12:03,299 INFO L226 Difference]: Without dead ends: 1313 [2022-11-03 02:12:03,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:12:03,301 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 908 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:03,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1699 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:12:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-11-03 02:12:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 929. [2022-11-03 02:12:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.4030172413793103) internal successors, (1302), 928 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1302 transitions. [2022-11-03 02:12:03,326 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1302 transitions. Word has length 218 [2022-11-03 02:12:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:03,327 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1302 transitions. [2022-11-03 02:12:03,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1302 transitions. [2022-11-03 02:12:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:03,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:03,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:03,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:03,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:03,558 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash 718211799, now seen corresponding path program 1 times [2022-11-03 02:12:03,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523299821] [2022-11-03 02:12:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:03,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:03,563 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:03,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:12:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:12:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:05,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:05,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:05,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523299821] [2022-11-03 02:12:05,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523299821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:05,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:12:05,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:12:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207419834] [2022-11-03 02:12:05,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:05,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:12:05,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:12:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:12:05,919 INFO L87 Difference]: Start difference. First operand 929 states and 1302 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:06,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:06,271 INFO L93 Difference]: Finished difference Result 1528 states and 2189 transitions. [2022-11-03 02:12:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:12:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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) Word has length 218 [2022-11-03 02:12:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:06,273 INFO L225 Difference]: With dead ends: 1528 [2022-11-03 02:12:06,274 INFO L226 Difference]: Without dead ends: 1313 [2022-11-03 02:12:06,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 214 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 02:12:06,275 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 896 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:06,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 1667 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:12:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-11-03 02:12:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 933. [2022-11-03 02:12:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 1.4023605150214593) internal successors, (1307), 932 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1307 transitions. [2022-11-03 02:12:06,291 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1307 transitions. Word has length 218 [2022-11-03 02:12:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:06,292 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1307 transitions. [2022-11-03 02:12:06,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 5 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 02:12:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1307 transitions. [2022-11-03 02:12:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:06,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:06,295 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:06,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:06,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:12:06,519 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -870136103, now seen corresponding path program 1 times [2022-11-03 02:12:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:06,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398044844] [2022-11-03 02:12:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:06,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:06,524 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:06,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:12:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:09,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:11,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398044844] [2022-11-03 02:12:11,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398044844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295141555] [2022-11-03 02:12:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:11,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:11,155 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:11,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:12:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:15,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295141555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341695064] [2022-11-03 02:12:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:16,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:16,412 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:16,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:12:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:19,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:21,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341695064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:21,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:21,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:12:21,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253414053] [2022-11-03 02:12:21,124 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:21,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:12:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:21,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:12:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:12:21,127 INFO L87 Difference]: Start difference. First operand 933 states and 1307 transitions. Second operand has 28 states, 28 states have (on average 30.25) internal successors, (847), 28 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:21,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:21,868 INFO L93 Difference]: Finished difference Result 1776 states and 2485 transitions. [2022-11-03 02:12:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:12:21,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 30.25) internal successors, (847), 28 states have internal predecessors, (847), 0 states have call successors, (0), 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 218 [2022-11-03 02:12:21,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:21,871 INFO L225 Difference]: With dead ends: 1776 [2022-11-03 02:12:21,871 INFO L226 Difference]: Without dead ends: 1561 [2022-11-03 02:12:21,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1316 GetRequests, 1276 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:12:21,872 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1264 mSDsluCounter, 4025 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:21,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1264 Valid, 4324 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-03 02:12:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2022-11-03 02:12:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1558. [2022-11-03 02:12:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 1.3879254977520874) internal successors, (2161), 1557 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 2161 transitions. [2022-11-03 02:12:21,902 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 2161 transitions. Word has length 218 [2022-11-03 02:12:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:21,902 INFO L495 AbstractCegarLoop]: Abstraction has 1558 states and 2161 transitions. [2022-11-03 02:12:21,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.25) internal successors, (847), 28 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:21,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 2161 transitions. [2022-11-03 02:12:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:21,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:21,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:21,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:22,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:22,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:22,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:22,520 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -611970665, now seen corresponding path program 1 times [2022-11-03 02:12:22,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:22,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016397527] [2022-11-03 02:12:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:22,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:22,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:22,524 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:12:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:25,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:27,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016397527] [2022-11-03 02:12:27,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016397527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233858599] [2022-11-03 02:12:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:27,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:27,019 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:27,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:12:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:29,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:32,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233858599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:32,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821427062] [2022-11-03 02:12:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:32,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:32,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:32,155 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:32,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:12:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:35,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:36,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821427062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:36,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:36,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 28 [2022-11-03 02:12:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414053622] [2022-11-03 02:12:36,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:12:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:12:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:12:36,643 INFO L87 Difference]: Start difference. First operand 1558 states and 2161 transitions. Second operand has 28 states, 28 states have (on average 30.321428571428573) internal successors, (849), 28 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:37,251 INFO L93 Difference]: Finished difference Result 3016 states and 4175 transitions. [2022-11-03 02:12:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:12:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 30.321428571428573) internal successors, (849), 28 states have internal predecessors, (849), 0 states have call successors, (0), 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 218 [2022-11-03 02:12:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:37,259 INFO L225 Difference]: With dead ends: 3016 [2022-11-03 02:12:37,259 INFO L226 Difference]: Without dead ends: 2801 [2022-11-03 02:12:37,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1276 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:12:37,262 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1043 mSDsluCounter, 5244 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:37,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 5601 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 106 Unchecked, 0.0s Time] [2022-11-03 02:12:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2022-11-03 02:12:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2756. [2022-11-03 02:12:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 1.3749546279491833) internal successors, (3788), 2755 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3788 transitions. [2022-11-03 02:12:37,341 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3788 transitions. Word has length 218 [2022-11-03 02:12:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 3788 transitions. [2022-11-03 02:12:37,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.321428571428573) internal successors, (849), 28 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3788 transitions. [2022-11-03 02:12:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:37,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:37,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:37,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:37,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:37,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:37,970 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash -947739373, now seen corresponding path program 1 times [2022-11-03 02:12:37,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:37,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767331325] [2022-11-03 02:12:37,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:37,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:37,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:37,974 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:37,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:12:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:41,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:42,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767331325] [2022-11-03 02:12:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767331325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488121759] [2022-11-03 02:12:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:42,315 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:42,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:12:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:47,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488121759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:47,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376904755] [2022-11-03 02:12:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:47,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:47,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:47,509 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:47,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 02:12:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:12:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:50,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:51,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376904755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:51,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:12:51,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2022-11-03 02:12:51,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454036001] [2022-11-03 02:12:51,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:12:51,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:12:51,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:12:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:12:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:12:51,115 INFO L87 Difference]: Start difference. First operand 2756 states and 3788 transitions. Second operand has 16 states, 16 states have (on average 26.8125) internal successors, (429), 16 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:51,454 INFO L93 Difference]: Finished difference Result 5563 states and 7651 transitions. [2022-11-03 02:12:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:12:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 26.8125) internal successors, (429), 16 states have internal predecessors, (429), 0 states have call successors, (0), 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 218 [2022-11-03 02:12:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:51,465 INFO L225 Difference]: With dead ends: 5563 [2022-11-03 02:12:51,465 INFO L226 Difference]: Without dead ends: 5346 [2022-11-03 02:12:51,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1284 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:12:51,468 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 1341 mSDsluCounter, 3943 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 4463 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:51,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 4463 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-03 02:12:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2022-11-03 02:12:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 5016. [2022-11-03 02:12:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5016 states, 5015 states have (on average 1.3639082751744767) internal successors, (6840), 5015 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5016 states to 5016 states and 6840 transitions. [2022-11-03 02:12:51,593 INFO L78 Accepts]: Start accepts. Automaton has 5016 states and 6840 transitions. Word has length 218 [2022-11-03 02:12:51,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:51,594 INFO L495 AbstractCegarLoop]: Abstraction has 5016 states and 6840 transitions. [2022-11-03 02:12:51,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 26.8125) internal successors, (429), 16 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5016 states and 6840 transitions. [2022-11-03 02:12:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:12:51,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:51,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:51,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:52,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:52,219 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1757085999, now seen corresponding path program 1 times [2022-11-03 02:12:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320696857] [2022-11-03 02:12:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:52,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:52,223 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:52,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:12:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:53,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:12:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:12:56,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:05,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320696857] [2022-11-03 02:13:05,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320696857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120970011] [2022-11-03 02:13:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:05,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:05,248 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:05,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:13:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:13:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:10,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:15,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120970011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400606677] [2022-11-03 02:13:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:15,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:15,011 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:15,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:13:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:13:16,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:13:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:13:29,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400606677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:29,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:29,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 15, 15] total 40 [2022-11-03 02:13:29,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634195147] [2022-11-03 02:13:29,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:13:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:29,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:13:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1427, Unknown=2, NotChecked=0, Total=1560 [2022-11-03 02:13:29,237 INFO L87 Difference]: Start difference. First operand 5016 states and 6840 transitions. Second operand has 40 states, 40 states have (on average 21.6) internal successors, (864), 40 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:35,534 INFO L93 Difference]: Finished difference Result 5962 states and 8101 transitions. [2022-11-03 02:13:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 02:13:35,534 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 21.6) internal successors, (864), 40 states have internal predecessors, (864), 0 states have call successors, (0), 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 218 [2022-11-03 02:13:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:35,544 INFO L225 Difference]: With dead ends: 5962 [2022-11-03 02:13:35,544 INFO L226 Difference]: Without dead ends: 5960 [2022-11-03 02:13:35,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1345 GetRequests, 1273 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=449, Invalid=4379, Unknown=2, NotChecked=0, Total=4830 [2022-11-03 02:13:35,548 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 1399 mSDsluCounter, 15875 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 16585 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:35,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 16585 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 478 Unchecked, 0.3s Time] [2022-11-03 02:13:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2022-11-03 02:13:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5769. [2022-11-03 02:13:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5768 states have (on average 1.3569694868238558) internal successors, (7827), 5768 states have internal predecessors, (7827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 7827 transitions. [2022-11-03 02:13:35,721 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 7827 transitions. Word has length 218 [2022-11-03 02:13:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:35,721 INFO L495 AbstractCegarLoop]: Abstraction has 5769 states and 7827 transitions. [2022-11-03 02:13:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 21.6) internal successors, (864), 40 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 7827 transitions. [2022-11-03 02:13:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:13:35,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:35,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:35,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:35,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:36,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:36,347 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash 626838739, now seen corresponding path program 1 times [2022-11-03 02:13:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:36,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094884701] [2022-11-03 02:13:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:36,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:36,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:36,352 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:36,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:13:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:13:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:38,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:38,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:38,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094884701] [2022-11-03 02:13:38,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094884701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:38,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:13:38,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:13:38,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803074859] [2022-11-03 02:13:38,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:38,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:13:38,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:38,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:13:38,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:13:38,341 INFO L87 Difference]: Start difference. First operand 5769 states and 7827 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:13:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:38,905 INFO L93 Difference]: Finished difference Result 6841 states and 9205 transitions. [2022-11-03 02:13:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:13:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:13:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:38,920 INFO L225 Difference]: With dead ends: 6841 [2022-11-03 02:13:38,920 INFO L226 Difference]: Without dead ends: 6259 [2022-11-03 02:13:38,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:13:38,924 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 211 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:38,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 2197 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-11-03 02:13:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2022-11-03 02:13:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 5769. [2022-11-03 02:13:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5768 states have (on average 1.3555825242718447) internal successors, (7819), 5768 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 7819 transitions. [2022-11-03 02:13:39,110 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 7819 transitions. Word has length 218 [2022-11-03 02:13:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:39,111 INFO L495 AbstractCegarLoop]: Abstraction has 5769 states and 7819 transitions. [2022-11-03 02:13:39,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:13:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 7819 transitions. [2022-11-03 02:13:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:13:39,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:39,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:39,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:39,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:39,318 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:39,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2013624149, now seen corresponding path program 1 times [2022-11-03 02:13:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:39,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606149538] [2022-11-03 02:13:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:39,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:39,322 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:39,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 02:13:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:13:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:44,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:13:56,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:13:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606149538] [2022-11-03 02:13:56,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606149538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734708116] [2022-11-03 02:13:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:56,660 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:13:56,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:13:56,661 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:13:56,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 02:13:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:59,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:13:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:02,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734708116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398732569] [2022-11-03 02:14:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:07,451 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:07,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 02:14:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:14:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:12,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398732569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:21,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:21,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 42 [2022-11-03 02:14:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609992816] [2022-11-03 02:14:21,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:14:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:14:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1584, Unknown=2, NotChecked=0, Total=1722 [2022-11-03 02:14:21,671 INFO L87 Difference]: Start difference. First operand 5769 states and 7819 transitions. Second operand has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:30,134 INFO L93 Difference]: Finished difference Result 11587 states and 15697 transitions. [2022-11-03 02:14:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:14:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 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 218 [2022-11-03 02:14:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:30,150 INFO L225 Difference]: With dead ends: 11587 [2022-11-03 02:14:30,150 INFO L226 Difference]: Without dead ends: 11585 [2022-11-03 02:14:30,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1271 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=461, Invalid=4793, Unknown=2, NotChecked=0, Total=5256 [2022-11-03 02:14:30,154 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1385 mSDsluCounter, 10634 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 11000 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:30,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1385 Valid, 11000 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 216 Unchecked, 0.1s Time] [2022-11-03 02:14:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-11-03 02:14:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 10153. [2022-11-03 02:14:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 1.3619976359338062) internal successors, (13827), 10152 states have internal predecessors, (13827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 13827 transitions. [2022-11-03 02:14:30,431 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 13827 transitions. Word has length 218 [2022-11-03 02:14:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:30,432 INFO L495 AbstractCegarLoop]: Abstraction has 10153 states and 13827 transitions. [2022-11-03 02:14:30,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 13827 transitions. [2022-11-03 02:14:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:14:30,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:30,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:30,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:30,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:30,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:31,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,066 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2136905815, now seen corresponding path program 1 times [2022-11-03 02:14:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:31,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928170832] [2022-11-03 02:14:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:31,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:31,070 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:31,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:14:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:14:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:32,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:32,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:32,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928170832] [2022-11-03 02:14:32,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928170832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:32,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:32,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:14:32,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444466769] [2022-11-03 02:14:32,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:32,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:14:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:14:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:32,543 INFO L87 Difference]: Start difference. First operand 10153 states and 13827 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:14:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:32,983 INFO L93 Difference]: Finished difference Result 20414 states and 27679 transitions. [2022-11-03 02:14:32,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:14:32,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:14:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:32,999 INFO L225 Difference]: With dead ends: 20414 [2022-11-03 02:14:33,000 INFO L226 Difference]: Without dead ends: 15063 [2022-11-03 02:14:33,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:14:33,009 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 299 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:33,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2087 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-11-03 02:14:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15063 states. [2022-11-03 02:14:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15063 to 10153. [2022-11-03 02:14:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 1.3556934594168637) internal successors, (13763), 10152 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 13763 transitions. [2022-11-03 02:14:33,274 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 13763 transitions. Word has length 218 [2022-11-03 02:14:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:33,277 INFO L495 AbstractCegarLoop]: Abstraction has 10153 states and 13763 transitions. [2022-11-03 02:14:33,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:14:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 13763 transitions. [2022-11-03 02:14:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:14:33,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:33,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:33,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,518 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1509468711, now seen corresponding path program 1 times [2022-11-03 02:14:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:33,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146161749] [2022-11-03 02:14:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:33,522 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:33,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:14:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:34,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:14:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:35,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:35,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:35,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146161749] [2022-11-03 02:14:35,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146161749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:35,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:35,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:14:35,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476787869] [2022-11-03 02:14:35,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:35,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:14:35,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:35,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:14:35,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:14:35,105 INFO L87 Difference]: Start difference. First operand 10153 states and 13763 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:14:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:35,741 INFO L93 Difference]: Finished difference Result 13666 states and 18348 transitions. [2022-11-03 02:14:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:14:35,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:14:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:35,751 INFO L225 Difference]: With dead ends: 13666 [2022-11-03 02:14:35,751 INFO L226 Difference]: Without dead ends: 11867 [2022-11-03 02:14:35,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:14:35,756 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 379 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2834 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:35,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 2834 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 13 Unchecked, 0.5s Time] [2022-11-03 02:14:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2022-11-03 02:14:35,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 10153. [2022-11-03 02:14:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 1.354117415287628) internal successors, (13747), 10152 states have internal predecessors, (13747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 13747 transitions. [2022-11-03 02:14:35,989 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 13747 transitions. Word has length 218 [2022-11-03 02:14:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:35,989 INFO L495 AbstractCegarLoop]: Abstraction has 10153 states and 13747 transitions. [2022-11-03 02:14:35,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:14:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 13747 transitions. [2022-11-03 02:14:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:14:36,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:36,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:36,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:36,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:36,223 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:36,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:36,223 INFO L85 PathProgramCache]: Analyzing trace with hash 844916571, now seen corresponding path program 1 times [2022-11-03 02:14:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:36,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220133608] [2022-11-03 02:14:36,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:36,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:36,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:36,228 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:36,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:14:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:14:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:40,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:55,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220133608] [2022-11-03 02:14:55,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220133608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [7083809] [2022-11-03 02:14:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:55,168 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:55,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:14:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:14:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:00,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [7083809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993641971] [2022-11-03 02:15:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:05,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:05,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:05,625 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:05,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 02:15:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:06,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:15:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:15:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:15:20,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993641971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:20,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:20,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 42 [2022-11-03 02:15:20,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807690773] [2022-11-03 02:15:20,192 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:15:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:15:20,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1582, Unknown=4, NotChecked=0, Total=1722 [2022-11-03 02:15:20,195 INFO L87 Difference]: Start difference. First operand 10153 states and 13747 transitions. Second operand has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:29,795 INFO L93 Difference]: Finished difference Result 12749 states and 17200 transitions. [2022-11-03 02:15:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:15:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 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 218 [2022-11-03 02:15:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:29,803 INFO L225 Difference]: With dead ends: 12749 [2022-11-03 02:15:29,803 INFO L226 Difference]: Without dead ends: 12747 [2022-11-03 02:15:29,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1347 GetRequests, 1271 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=461, Invalid=4791, Unknown=4, NotChecked=0, Total=5256 [2022-11-03 02:15:29,806 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 1716 mSDsluCounter, 16215 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 16866 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:29,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 16866 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 412 Unchecked, 0.3s Time] [2022-11-03 02:15:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12747 states. [2022-11-03 02:15:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12747 to 10217. [2022-11-03 02:15:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 1.3534651527016446) internal successors, (13827), 10216 states have internal predecessors, (13827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 13827 transitions. [2022-11-03 02:15:30,039 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 13827 transitions. Word has length 218 [2022-11-03 02:15:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:30,042 INFO L495 AbstractCegarLoop]: Abstraction has 10217 states and 13827 transitions. [2022-11-03 02:15:30,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 13827 transitions. [2022-11-03 02:15:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:15:30,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:30,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:30,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:30,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:30,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:30,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:30,679 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2098665507, now seen corresponding path program 1 times [2022-11-03 02:15:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041351282] [2022-11-03 02:15:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:30,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:30,683 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:30,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:15:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:31,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:15:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:32,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:32,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:32,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041351282] [2022-11-03 02:15:32,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041351282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:32,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:32,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:15:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502182086] [2022-11-03 02:15:32,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:32,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:32,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:15:32,334 INFO L87 Difference]: Start difference. First operand 10217 states and 13827 transitions. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:15:32,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:32,901 INFO L93 Difference]: Finished difference Result 14022 states and 18802 transitions. [2022-11-03 02:15:32,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:15:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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) Word has length 218 [2022-11-03 02:15:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:32,910 INFO L225 Difference]: With dead ends: 14022 [2022-11-03 02:15:32,910 INFO L226 Difference]: Without dead ends: 12207 [2022-11-03 02:15:32,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:15:32,914 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 353 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:32,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2150 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-11-03 02:15:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2022-11-03 02:15:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10505. [2022-11-03 02:15:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10504 states have (on average 1.3513899466869763) internal successors, (14195), 10504 states have internal predecessors, (14195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 14195 transitions. [2022-11-03 02:15:33,142 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 14195 transitions. Word has length 218 [2022-11-03 02:15:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:33,142 INFO L495 AbstractCegarLoop]: Abstraction has 10505 states and 14195 transitions. [2022-11-03 02:15:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 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 02:15:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 14195 transitions. [2022-11-03 02:15:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:15:33,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:33,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:15:33,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:33,366 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2071599905, now seen corresponding path program 1 times [2022-11-03 02:15:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:33,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705407656] [2022-11-03 02:15:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:33,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:33,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:33,370 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:33,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:15:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:34,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:15:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:37,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:50,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:50,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705407656] [2022-11-03 02:15:50,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705407656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:50,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2035630703] [2022-11-03 02:15:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:50,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:50,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:50,824 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:50,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:15:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:15:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:02,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2035630703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:02,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404175707] [2022-11-03 02:16:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:02,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:02,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:02,284 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:02,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-03 02:16:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:16:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:16:07,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:16:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404175707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:17,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:16:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 42 [2022-11-03 02:16:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847437422] [2022-11-03 02:16:17,002 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:16:17,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:16:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:16:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1583, Unknown=3, NotChecked=0, Total=1722 [2022-11-03 02:16:17,004 INFO L87 Difference]: Start difference. First operand 10505 states and 14195 transitions. Second operand has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:35,014 INFO L93 Difference]: Finished difference Result 11640 states and 15862 transitions. [2022-11-03 02:16:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 02:16:35,015 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 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 218 [2022-11-03 02:16:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:35,022 INFO L225 Difference]: With dead ends: 11640 [2022-11-03 02:16:35,022 INFO L226 Difference]: Without dead ends: 11638 [2022-11-03 02:16:35,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1364 GetRequests, 1277 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=556, Invalid=6413, Unknown=3, NotChecked=0, Total=6972 [2022-11-03 02:16:35,025 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1668 mSDsluCounter, 12770 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 13173 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:35,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1668 Valid, 13173 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 311 Unchecked, 0.2s Time] [2022-11-03 02:16:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11638 states. [2022-11-03 02:16:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11638 to 10085. [2022-11-03 02:16:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10085 states, 10084 states have (on average 1.3553153510511702) internal successors, (13667), 10084 states have internal predecessors, (13667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10085 states to 10085 states and 13667 transitions. [2022-11-03 02:16:35,255 INFO L78 Accepts]: Start accepts. Automaton has 10085 states and 13667 transitions. Word has length 218 [2022-11-03 02:16:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:35,256 INFO L495 AbstractCegarLoop]: Abstraction has 10085 states and 13667 transitions. [2022-11-03 02:16:35,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10085 states and 13667 transitions. [2022-11-03 02:16:35,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:16:35,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:35,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:16:35,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:35,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:35,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:35,879 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:35,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -734859229, now seen corresponding path program 1 times [2022-11-03 02:16:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:35,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005711665] [2022-11-03 02:16:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:35,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:35,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:35,884 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-03 02:16:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:16:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:40,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:57,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005711665] [2022-11-03 02:16:57,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005711665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1796181483] [2022-11-03 02:16:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:57,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:57,122 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:57,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-03 02:16:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:16:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:02,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1796181483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718452510] [2022-11-03 02:17:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:09,497 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:09,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-03 02:17:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:17:10,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:14,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:27,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718452510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:27,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:27,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 28 [2022-11-03 02:17:27,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895231651] [2022-11-03 02:17:27,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:17:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:17:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=649, Unknown=6, NotChecked=0, Total=756 [2022-11-03 02:17:27,267 INFO L87 Difference]: Start difference. First operand 10085 states and 13667 transitions. Second operand has 28 states, 28 states have (on average 30.071428571428573) internal successors, (842), 28 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:28,545 INFO L93 Difference]: Finished difference Result 13117 states and 17593 transitions. [2022-11-03 02:17:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:17:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 30.071428571428573) internal successors, (842), 28 states have internal predecessors, (842), 0 states have call successors, (0), 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 218 [2022-11-03 02:17:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:28,557 INFO L225 Difference]: With dead ends: 13117 [2022-11-03 02:17:28,557 INFO L226 Difference]: Without dead ends: 13115 [2022-11-03 02:17:28,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1275 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=227, Invalid=1099, Unknown=6, NotChecked=0, Total=1332 [2022-11-03 02:17:28,561 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1567 mSDsluCounter, 6748 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 7241 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:28,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 7241 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-03 02:17:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13115 states. [2022-11-03 02:17:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13115 to 10743. [2022-11-03 02:17:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 1.3490970024204059) internal successors, (14492), 10742 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 14492 transitions. [2022-11-03 02:17:28,818 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 14492 transitions. Word has length 218 [2022-11-03 02:17:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:28,819 INFO L495 AbstractCegarLoop]: Abstraction has 10743 states and 14492 transitions. [2022-11-03 02:17:28,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 30.071428571428573) internal successors, (842), 28 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:17:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 14492 transitions. [2022-11-03 02:17:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:17:28,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:28,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:17:28,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:29,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:29,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:29,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:29,459 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1951012955, now seen corresponding path program 1 times [2022-11-03 02:17:29,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:29,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032956868] [2022-11-03 02:17:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:29,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:29,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:29,463 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:29,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-03 02:17:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:17:30,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:34,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:50,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032956868] [2022-11-03 02:17:50,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032956868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:50,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1097361126] [2022-11-03 02:17:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:50,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:50,573 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:50,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-03 02:17:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:17:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:55,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:02,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1097361126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586631790] [2022-11-03 02:18:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:02,819 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:02,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-03 02:18:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:04,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:18:04,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:12,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:18:53,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586631790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:53,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:53,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 13] total 35 [2022-11-03 02:18:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964939019] [2022-11-03 02:18:53,259 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:53,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:18:53,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:18:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1043, Unknown=17, NotChecked=0, Total=1190 [2022-11-03 02:18:53,261 INFO L87 Difference]: Start difference. First operand 10743 states and 14492 transitions. Second operand has 35 states, 35 states have (on average 24.62857142857143) internal successors, (862), 35 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:04,584 INFO L93 Difference]: Finished difference Result 12610 states and 16830 transitions. [2022-11-03 02:19:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:19:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 24.62857142857143) internal successors, (862), 35 states have internal predecessors, (862), 0 states have call successors, (0), 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 218 [2022-11-03 02:19:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:04,594 INFO L225 Difference]: With dead ends: 12610 [2022-11-03 02:19:04,594 INFO L226 Difference]: Without dead ends: 12608 [2022-11-03 02:19:04,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 1269 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 65.4s TimeCoverageRelationStatistics Valid=294, Invalid=1941, Unknown=21, NotChecked=0, Total=2256 [2022-11-03 02:19:04,596 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 1351 mSDsluCounter, 7882 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 8230 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:04,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 8230 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 82 Unchecked, 0.0s Time] [2022-11-03 02:19:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12608 states. [2022-11-03 02:19:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12608 to 10995. [2022-11-03 02:19:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10995 states, 10994 states have (on average 1.346097871566309) internal successors, (14799), 10994 states have internal predecessors, (14799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10995 states to 10995 states and 14799 transitions. [2022-11-03 02:19:04,806 INFO L78 Accepts]: Start accepts. Automaton has 10995 states and 14799 transitions. Word has length 218 [2022-11-03 02:19:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 10995 states and 14799 transitions. [2022-11-03 02:19:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 24.62857142857143) internal successors, (862), 35 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10995 states and 14799 transitions. [2022-11-03 02:19:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:19:04,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:04,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:04,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:05,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:05,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:05,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:05,439 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1950953373, now seen corresponding path program 1 times [2022-11-03 02:19:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:19:05,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061755097] [2022-11-03 02:19:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:05,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:19:05,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:19:05,443 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:19:05,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:19:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:19:06,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:25,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:19:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061755097] [2022-11-03 02:19:25,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061755097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [559475179] [2022-11-03 02:19:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:25,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:19:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:19:25,029 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:19:25,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:19:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:19:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:30,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:37,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [559475179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:37,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930140373] [2022-11-03 02:19:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:37,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:37,375 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:37,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-03 02:19:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 02:19:38,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:19:42,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:19:53,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930140373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:53,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:19:53,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 15, 15] total 42 [2022-11-03 02:19:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920007814] [2022-11-03 02:19:53,549 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:19:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:19:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:19:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1577, Unknown=3, NotChecked=0, Total=1722 [2022-11-03 02:19:53,551 INFO L87 Difference]: Start difference. First operand 10995 states and 14799 transitions. Second operand has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:05,230 INFO L93 Difference]: Finished difference Result 14083 states and 18869 transitions. [2022-11-03 02:20:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:20:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 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 218 [2022-11-03 02:20:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:05,242 INFO L225 Difference]: With dead ends: 14083 [2022-11-03 02:20:05,242 INFO L226 Difference]: Without dead ends: 14081 [2022-11-03 02:20:05,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1342 GetRequests, 1270 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=428, Invalid=4261, Unknown=3, NotChecked=0, Total=4692 [2022-11-03 02:20:05,245 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1880 mSDsluCounter, 11413 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1880 SdHoareTripleChecker+Valid, 11839 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1880 Valid, 11839 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 381 Unchecked, 0.3s Time] [2022-11-03 02:20:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14081 states. [2022-11-03 02:20:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14081 to 13271. [2022-11-03 02:20:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 1.343255463451394) internal successors, (17825), 13270 states have internal predecessors, (17825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 17825 transitions. [2022-11-03 02:20:05,529 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 17825 transitions. Word has length 218 [2022-11-03 02:20:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:05,530 INFO L495 AbstractCegarLoop]: Abstraction has 13271 states and 17825 transitions. [2022-11-03 02:20:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 20.571428571428573) internal successors, (864), 42 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 17825 transitions. [2022-11-03 02:20:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-03 02:20:05,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:05,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:05,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:05,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:05,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:06,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:20:06,142 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:06,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1912745125, now seen corresponding path program 1 times [2022-11-03 02:20:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:20:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207381361] [2022-11-03 02:20:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:20:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:20:06,147 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:20:06,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-03 02:20:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:07,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:20:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:11,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:26,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:20:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207381361] [2022-11-03 02:20:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207381361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:26,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [53455876] [2022-11-03 02:20:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:26,738 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:20:26,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:20:26,739 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:20:26,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-03 02:20:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:20:29,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:32,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:40,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [53455876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:40,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176699839] [2022-11-03 02:20:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:40,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:40,682 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:40,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71d3790f-be86-4ae5-9470-e8f61d75bda1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-03 02:20:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2628 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:20:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:45,618 INFO L328 TraceCheckSpWp]: Computing backward predicates...