./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/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_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/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_560141f0-e187-4759-a3a2-3e0b29c210f2/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 380873ab273780c7377981a430c44399a114a4cac3a6c2b285ac6abb54f6df2f --- 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 01:56:44,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:44,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:44,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:44,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:44,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:44,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:44,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:44,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:44,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:44,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:44,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:44,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:44,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:44,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:44,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:44,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:44,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:44,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:44,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:44,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:44,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:44,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:44,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:44,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:44,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:44,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:44,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:44,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:44,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:44,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:44,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:44,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:44,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:44,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:44,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:44,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:44,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:44,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:44,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:44,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:44,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:56:45,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:45,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:45,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:45,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:45,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:45,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:45,071 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:45,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:45,072 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:45,072 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:45,073 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:45,074 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:45,074 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:45,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:45,075 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:45,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:45,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:45,075 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:45,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:45,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:45,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:45,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:45,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:45,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:45,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:45,078 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:45,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:45,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:45,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:45,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:45,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:45,087 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:45,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:45,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:45,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:45,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:45,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:45,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:45,088 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_560141f0-e187-4759-a3a2-3e0b29c210f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380873ab273780c7377981a430c44399a114a4cac3a6c2b285ac6abb54f6df2f [2022-11-03 01:56:45,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:45,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:45,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:45,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:45,474 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:45,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c [2022-11-03 01:56:45,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/970970585/2a35cf4ccdb54490a1548cb0485750c1/FLAG6482e3efa [2022-11-03 01:56:46,232 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:46,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c [2022-11-03 01:56:46,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/970970585/2a35cf4ccdb54490a1548cb0485750c1/FLAG6482e3efa [2022-11-03 01:56:46,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/970970585/2a35cf4ccdb54490a1548cb0485750c1 [2022-11-03 01:56:46,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:46,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:46,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:46,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:46,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:46,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:46" (1/1) ... [2022-11-03 01:56:46,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c78cb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:46, skipping insertion in model container [2022-11-03 01:56:46,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:46" (1/1) ... [2022-11-03 01:56:46,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:46,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:46,961 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_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c[1107,1120] [2022-11-03 01:56:47,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:47,289 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:47,302 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_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c[1107,1120] [2022-11-03 01:56:47,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:47,428 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:47,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47 WrapperNode [2022-11-03 01:56:47,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:47,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:47,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:47,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:47,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,570 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 835 [2022-11-03 01:56:47,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:47,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:47,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:47,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:47,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:47,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:47,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:47,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:47,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (1/1) ... [2022-11-03 01:56:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:47,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:47,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:47,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:48,302 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:48,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:49,673 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:51,588 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:51,588 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:56:51,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:51 BoogieIcfgContainer [2022-11-03 01:56:51,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:51,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:51,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:51,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:51,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:46" (1/3) ... [2022-11-03 01:56:51,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:51, skipping insertion in model container [2022-11-03 01:56:51,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:47" (2/3) ... [2022-11-03 01:56:51,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea5d825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:51, skipping insertion in model container [2022-11-03 01:56:51,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:51" (3/3) ... [2022-11-03 01:56:51,607 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul8.c [2022-11-03 01:56:51,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:51,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:56:51,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:51,731 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;@1ea4cc83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:51,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:56:51,739 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 01:56:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:56:51,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:51,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:56:51,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash 9916399, now seen corresponding path program 1 times [2022-11-03 01:56:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124445179] [2022-11-03 01:56:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:51,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:56:52,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:56:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:56:52,783 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:56:52,785 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:56:52,787 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:56:52,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:52,796 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:56:52,801 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:56:52,833 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 01:56:52,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:56:52 BoogieIcfgContainer [2022-11-03 01:56:52,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:56:52,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:56:52,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:56:52,850 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:56:52,851 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:51" (3/4) ... [2022-11-03 01:56:52,855 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:56:52,855 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:56:52,857 INFO L158 Benchmark]: Toolchain (without parser) took 6339.28ms. Allocated memory was 100.7MB in the beginning and 352.3MB in the end (delta: 251.7MB). Free memory was 54.0MB in the beginning and 203.0MB in the end (delta: -149.0MB). Peak memory consumption was 103.0MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,857 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:56:52,858 INFO L158 Benchmark]: CACSL2BoogieTranslator took 906.73ms. Allocated memory is still 100.7MB. Free memory was 53.8MB in the beginning and 58.7MB in the end (delta: -4.8MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,859 INFO L158 Benchmark]: Boogie Procedure Inliner took 140.45ms. Allocated memory is still 100.7MB. Free memory was 58.7MB in the beginning and 46.0MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,860 INFO L158 Benchmark]: Boogie Preprocessor took 153.63ms. Allocated memory was 100.7MB in the beginning and 140.5MB in the end (delta: 39.8MB). Free memory was 46.0MB in the beginning and 107.8MB in the end (delta: -61.8MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,861 INFO L158 Benchmark]: RCFGBuilder took 3866.68ms. Allocated memory was 140.5MB in the beginning and 352.3MB in the end (delta: 211.8MB). Free memory was 107.7MB in the beginning and 267.0MB in the end (delta: -159.3MB). Peak memory consumption was 124.6MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,862 INFO L158 Benchmark]: TraceAbstraction took 1252.13ms. Allocated memory is still 352.3MB. Free memory was 266.0MB in the beginning and 204.1MB in the end (delta: 61.9MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,863 INFO L158 Benchmark]: Witness Printer took 5.78ms. Allocated memory is still 352.3MB. Free memory was 204.1MB in the beginning and 203.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:56:52,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 906.73ms. Allocated memory is still 100.7MB. Free memory was 53.8MB in the beginning and 58.7MB in the end (delta: -4.8MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 140.45ms. Allocated memory is still 100.7MB. Free memory was 58.7MB in the beginning and 46.0MB in the end (delta: 12.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 153.63ms. Allocated memory was 100.7MB in the beginning and 140.5MB in the end (delta: 39.8MB). Free memory was 46.0MB in the beginning and 107.8MB in the end (delta: -61.8MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3866.68ms. Allocated memory was 140.5MB in the beginning and 352.3MB in the end (delta: 211.8MB). Free memory was 107.7MB in the beginning and 267.0MB in the end (delta: -159.3MB). Peak memory consumption was 124.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1252.13ms. Allocated memory is still 352.3MB. Free memory was 266.0MB in the beginning and 204.1MB in the end (delta: 61.9MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. * Witness Printer took 5.78ms. Allocated memory is still 352.3MB. Free memory was 204.1MB in the beginning and 203.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 208, overapproximation of bitwiseAnd at line 149. 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_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 32); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (32 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 64); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (64 - 1); [L34] const SORT_215 mask_SORT_215 = (SORT_215)-1 >> (sizeof(SORT_215) * 8 - 4); [L35] const SORT_215 msb_SORT_215 = (SORT_215)1 << (4 - 1); [L37] const SORT_217 mask_SORT_217 = (SORT_217)-1 >> (sizeof(SORT_217) * 8 - 60); [L38] const SORT_217 msb_SORT_217 = (SORT_217)1 << (60 - 1); [L40] const SORT_10 var_11 = 0; [L41] const SORT_1 var_14 = 0; [L42] const SORT_3 var_24 = 0; [L43] const SORT_1 var_51 = 1; [L44] const SORT_3 var_204 = 1; [L45] const SORT_3 var_208 = 3735928559; [L46] const SORT_3 var_211 = 12245771; [L47] const SORT_215 var_216 = 0; [L49] SORT_1 input_2; [L50] SORT_3 input_4; [L51] SORT_3 input_5; [L52] SORT_1 input_6; [L53] SORT_1 input_7; [L54] SORT_1 input_8; [L55] SORT_1 input_9; [L57] SORT_10 state_12 = __VERIFIER_nondet_ulong() & mask_SORT_10; [L58] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L59] SORT_10 state_18 = __VERIFIER_nondet_ulong() & mask_SORT_10; [L60] SORT_1 state_20 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L61] SORT_3 state_25 = __VERIFIER_nondet_uint() & mask_SORT_3; [L62] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L63] SORT_3 state_30 = __VERIFIER_nondet_uint() & mask_SORT_3; [L64] SORT_1 state_32 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L65] SORT_3 state_37 = __VERIFIER_nondet_uint() & mask_SORT_3; [L66] SORT_1 state_39 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L67] SORT_3 state_42 = __VERIFIER_nondet_uint() & mask_SORT_3; [L68] SORT_1 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L69] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L70] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L71] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L72] SORT_1 state_67 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L73] SORT_1 state_69 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L74] SORT_1 state_71 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L75] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L76] SORT_1 state_75 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L77] SORT_1 state_77 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L78] SORT_1 state_79 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_81 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_83 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_85 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_220 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_251 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_264 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_269 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_10 init_13_arg_1 = var_11; [L88] state_12 = init_13_arg_1 [L89] SORT_1 init_16_arg_1 = var_14; [L90] state_15 = init_16_arg_1 [L91] SORT_10 init_19_arg_1 = var_11; [L92] state_18 = init_19_arg_1 [L93] SORT_1 init_21_arg_1 = var_14; [L94] state_20 = init_21_arg_1 [L95] SORT_3 init_26_arg_1 = var_24; [L96] state_25 = init_26_arg_1 [L97] SORT_1 init_28_arg_1 = var_14; [L98] state_27 = init_28_arg_1 [L99] SORT_3 init_31_arg_1 = var_24; [L100] state_30 = init_31_arg_1 [L101] SORT_1 init_33_arg_1 = var_14; [L102] state_32 = init_33_arg_1 [L103] SORT_3 init_38_arg_1 = var_24; [L104] state_37 = init_38_arg_1 [L105] SORT_1 init_40_arg_1 = var_14; [L106] state_39 = init_40_arg_1 [L107] SORT_3 init_43_arg_1 = var_24; [L108] state_42 = init_43_arg_1 [L109] SORT_1 init_45_arg_1 = var_14; [L110] state_44 = init_45_arg_1 [L111] SORT_1 init_62_arg_1 = var_14; [L112] state_61 = init_62_arg_1 [L113] SORT_1 init_64_arg_1 = var_14; [L114] state_63 = init_64_arg_1 [L115] SORT_1 init_66_arg_1 = var_14; [L116] state_65 = init_66_arg_1 [L117] SORT_1 init_68_arg_1 = var_14; [L118] state_67 = init_68_arg_1 [L119] SORT_1 init_70_arg_1 = var_14; [L120] state_69 = init_70_arg_1 [L121] SORT_1 init_72_arg_1 = var_14; [L122] state_71 = init_72_arg_1 [L123] SORT_1 init_74_arg_1 = var_14; [L124] state_73 = init_74_arg_1 [L125] SORT_1 init_76_arg_1 = var_14; [L126] state_75 = init_76_arg_1 [L127] SORT_1 init_78_arg_1 = var_14; [L128] state_77 = init_78_arg_1 [L129] SORT_1 init_80_arg_1 = var_14; [L130] state_79 = init_80_arg_1 [L131] SORT_1 init_82_arg_1 = var_14; [L132] state_81 = init_82_arg_1 [L133] SORT_1 init_84_arg_1 = var_14; [L134] state_83 = init_84_arg_1 [L135] SORT_1 init_86_arg_1 = var_14; [L136] state_85 = init_86_arg_1 [L137] SORT_1 init_221_arg_1 = var_14; [L138] state_220 = init_221_arg_1 [L139] SORT_1 init_252_arg_1 = var_14; [L140] state_251 = init_252_arg_1 [L141] SORT_1 init_265_arg_1 = var_14; [L142] state_264 = init_265_arg_1 [L143] SORT_1 init_270_arg_1 = var_14; [L144] state_269 = init_270_arg_1 VAL [init_13_arg_1=0, init_16_arg_1=0, init_19_arg_1=0, init_21_arg_1=0, init_221_arg_1=0, init_252_arg_1=0, init_265_arg_1=0, init_26_arg_1=0, init_270_arg_1=0, init_28_arg_1=0, init_31_arg_1=0, init_33_arg_1=0, init_38_arg_1=0, init_40_arg_1=0, init_43_arg_1=0, init_45_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_80_arg_1=0, init_82_arg_1=0, init_84_arg_1=0, init_86_arg_1=0, mask_SORT_1=1, mask_SORT_10=18446744073709551615, mask_SORT_215=15, mask_SORT_217=18446744073709551615, mask_SORT_3=4294967295, msb_SORT_1=1, msb_SORT_10=9223372036854775808, msb_SORT_215=8, msb_SORT_217=576460752303423488, msb_SORT_3=2147483648, state_12=0, state_15=0, state_18=0, state_20=0, state_220=0, state_25=0, state_251=0, state_264=0, state_269=0, state_27=0, state_30=0, state_32=0, state_37=0, state_39=0, state_42=0, state_44=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_81=0, state_83=0, state_85=0, var_11=0, var_14=0, var_204=1, var_208=3735928559, var_211=12245771, var_216=0, var_24=0, var_51=1] [L147] input_2 = __VERIFIER_nondet_uchar() [L148] input_4 = __VERIFIER_nondet_uint() [L149] input_4 = input_4 & mask_SORT_3 [L150] input_5 = __VERIFIER_nondet_uint() [L151] input_5 = input_5 & mask_SORT_3 [L152] input_6 = __VERIFIER_nondet_uchar() [L153] input_6 = input_6 & mask_SORT_1 [L154] input_7 = __VERIFIER_nondet_uchar() [L155] input_7 = input_7 & mask_SORT_1 [L156] input_8 = __VERIFIER_nondet_uchar() [L157] input_8 = input_8 & mask_SORT_1 [L158] input_9 = __VERIFIER_nondet_uchar() [L159] input_9 = input_9 & mask_SORT_1 [L162] SORT_1 var_17_arg_0 = state_15; [L163] SORT_10 var_17_arg_1 = state_12; [L164] SORT_10 var_17_arg_2 = var_11; [L165] EXPR var_17_arg_0 ? var_17_arg_1 : var_17_arg_2 [L165] SORT_10 var_17 = var_17_arg_0 ? var_17_arg_1 : var_17_arg_2; [L166] var_17 = var_17 & mask_SORT_10 [L167] SORT_1 var_22_arg_0 = state_20; [L168] SORT_10 var_22_arg_1 = state_18; [L169] SORT_10 var_22_arg_2 = var_11; [L170] EXPR var_22_arg_0 ? var_22_arg_1 : var_22_arg_2 [L170] SORT_10 var_22 = var_22_arg_0 ? var_22_arg_1 : var_22_arg_2; [L171] var_22 = var_22 & mask_SORT_10 [L172] SORT_10 var_23_arg_0 = var_17; [L173] SORT_10 var_23_arg_1 = var_22; [L174] SORT_1 var_23 = var_23_arg_0 == var_23_arg_1; [L175] SORT_1 var_29_arg_0 = state_27; [L176] SORT_3 var_29_arg_1 = state_25; [L177] SORT_3 var_29_arg_2 = var_24; [L178] EXPR var_29_arg_0 ? var_29_arg_1 : var_29_arg_2 [L178] SORT_3 var_29 = var_29_arg_0 ? var_29_arg_1 : var_29_arg_2; [L179] var_29 = var_29 & mask_SORT_3 [L180] SORT_1 var_34_arg_0 = state_32; [L181] SORT_3 var_34_arg_1 = state_30; [L182] SORT_3 var_34_arg_2 = var_24; [L183] EXPR var_34_arg_0 ? var_34_arg_1 : var_34_arg_2 [L183] SORT_3 var_34 = var_34_arg_0 ? var_34_arg_1 : var_34_arg_2; [L184] var_34 = var_34 & mask_SORT_3 [L185] SORT_3 var_35_arg_0 = var_29; [L186] SORT_3 var_35_arg_1 = var_34; [L187] SORT_1 var_35 = var_35_arg_0 == var_35_arg_1; [L188] SORT_1 var_36_arg_0 = var_23; [L189] SORT_1 var_36_arg_1 = var_35; [L190] SORT_1 var_36 = var_36_arg_0 & var_36_arg_1; [L191] SORT_1 var_41_arg_0 = state_39; [L192] SORT_3 var_41_arg_1 = state_37; [L193] SORT_3 var_41_arg_2 = var_24; [L194] EXPR var_41_arg_0 ? var_41_arg_1 : var_41_arg_2 [L194] SORT_3 var_41 = var_41_arg_0 ? var_41_arg_1 : var_41_arg_2; [L195] var_41 = var_41 & mask_SORT_3 [L196] SORT_1 var_46_arg_0 = state_44; [L197] SORT_3 var_46_arg_1 = state_42; [L198] SORT_3 var_46_arg_2 = var_24; [L199] EXPR var_46_arg_0 ? var_46_arg_1 : var_46_arg_2 [L199] SORT_3 var_46 = var_46_arg_0 ? var_46_arg_1 : var_46_arg_2; [L200] var_46 = var_46 & mask_SORT_3 [L201] SORT_3 var_47_arg_0 = var_41; [L202] SORT_3 var_47_arg_1 = var_46; [L203] SORT_1 var_47 = var_47_arg_0 == var_47_arg_1; [L204] SORT_1 var_48_arg_0 = var_36; [L205] SORT_1 var_48_arg_1 = var_47; [L206] SORT_1 var_48 = var_48_arg_0 & var_48_arg_1; [L207] SORT_1 var_52_arg_0 = var_48; [L208] SORT_1 var_52 = ~var_52_arg_0; [L209] SORT_1 var_53_arg_0 = var_51; [L210] SORT_1 var_53_arg_1 = var_52; [L211] SORT_1 var_53 = var_53_arg_0 & var_53_arg_1; [L212] var_53 = var_53 & mask_SORT_1 [L213] SORT_1 bad_54_arg_0 = var_53; [L214] CALL __VERIFIER_assert(!(bad_54_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: 1.1s, 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, 0.6s 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 01:56:52,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/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_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/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_560141f0-e187-4759-a3a2-3e0b29c210f2/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 380873ab273780c7377981a430c44399a114a4cac3a6c2b285ac6abb54f6df2f --- 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 01:56:55,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:55,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:55,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:55,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:55,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:55,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:55,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:55,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:55,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:55,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:55,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:55,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:55,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:56,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:56,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:56,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:56,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:56,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:56,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:56,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:56,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:56,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:56,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:56,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:56,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:56,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:56,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:56,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:56,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:56,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:56,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:56,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:56,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:56,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:56,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:56,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:56,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:56,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:56,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:56,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:56,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 01:56:56,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:56,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:56,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:56,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:56,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:56,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:56,074 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:56,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:56,075 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:56,075 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:56,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:56,076 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:56,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:56,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:56,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:56,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:56,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:56,079 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:56:56,079 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:56:56,079 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:56:56,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:56,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:56,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:56,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:56,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:56:56,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:56,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:56,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:56,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:56,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:56,083 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:56:56,083 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:56:56,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:56,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:56,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:56:56,085 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_560141f0-e187-4759-a3a2-3e0b29c210f2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 380873ab273780c7377981a430c44399a114a4cac3a6c2b285ac6abb54f6df2f [2022-11-03 01:56:56,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:56,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:56,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:56,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:56,620 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:56,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c [2022-11-03 01:56:56,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/6f6629cf7/613246c54d094284ad8ab523fe6e22db/FLAGa59a0b76d [2022-11-03 01:56:57,524 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:57,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c [2022-11-03 01:56:57,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/6f6629cf7/613246c54d094284ad8ab523fe6e22db/FLAGa59a0b76d [2022-11-03 01:56:57,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/data/6f6629cf7/613246c54d094284ad8ab523fe6e22db [2022-11-03 01:56:57,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:57,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:57,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:57,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:57,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:57,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:57" (1/1) ... [2022-11-03 01:56:57,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312e0142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:57, skipping insertion in model container [2022-11-03 01:56:57,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:57" (1/1) ... [2022-11-03 01:56:57,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:57,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:58,030 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_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c[1107,1120] [2022-11-03 01:56:58,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:58,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:58,327 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_560141f0-e187-4759-a3a2-3e0b29c210f2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul8.c[1107,1120] [2022-11-03 01:56:58,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:58,463 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:58,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58 WrapperNode [2022-11-03 01:56:58,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:58,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:58,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:58,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:58,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,629 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 835 [2022-11-03 01:56:58,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:58,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:58,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:58,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:58,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:58,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:58,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:58,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:58,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (1/1) ... [2022-11-03 01:56:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:58,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:58,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:58,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:58,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:58,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:59,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:59,242 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:57:00,351 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:57:00,373 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:57:00,379 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:57:00,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:00 BoogieIcfgContainer [2022-11-03 01:57:00,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:57:00,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:57:00,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:57:00,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:57:00,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:57" (1/3) ... [2022-11-03 01:57:00,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b7de10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:00, skipping insertion in model container [2022-11-03 01:57:00,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:58" (2/3) ... [2022-11-03 01:57:00,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b7de10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:57:00, skipping insertion in model container [2022-11-03 01:57:00,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:57:00" (3/3) ... [2022-11-03 01:57:00,402 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul8.c [2022-11-03 01:57:00,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:57:00,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:57:00,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:57:00,497 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;@2e8c7237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:57:00,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:57:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 84 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:00,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:00,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:00,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1892373183, now seen corresponding path program 1 times [2022-11-03 01:57:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623739671] [2022-11-03 01:57:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:00,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:00,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:57:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:00,986 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 01:57:00,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:00,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:00,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623739671] [2022-11-03 01:57:00,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623739671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:00,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:00,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994064000] [2022-11-03 01:57:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:01,039 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.4939759036144578) internal successors, (124), 84 states have internal predecessors, (124), 0 states have call successors, (0), 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 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:01,170 INFO L93 Difference]: Finished difference Result 321 states and 479 transitions. [2022-11-03 01:57:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:01,187 INFO L225 Difference]: With dead ends: 321 [2022-11-03 01:57:01,188 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:01,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:01,197 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 341 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:01,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 458 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 83. [2022-11-03 01:57:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2022-11-03 01:57:01,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 17 [2022-11-03 01:57:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:01,258 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2022-11-03 01:57:01,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2022-11-03 01:57:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:01,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:01,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:01,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:01,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:01,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:01,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1391476863, now seen corresponding path program 1 times [2022-11-03 01:57:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:01,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145816323] [2022-11-03 01:57:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:01,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:01,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:01,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:57:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:01,876 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 01:57:01,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:01,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:01,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145816323] [2022-11-03 01:57:01,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145816323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:01,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:01,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604655084] [2022-11-03 01:57:01,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:01,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:01,893 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:02,003 INFO L93 Difference]: Finished difference Result 317 states and 463 transitions. [2022-11-03 01:57:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:02,013 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:57:02,014 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:02,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:02,019 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 335 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:02,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 457 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 85. [2022-11-03 01:57:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4523809523809523) internal successors, (122), 84 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2022-11-03 01:57:02,048 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 17 [2022-11-03 01:57:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:02,049 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2022-11-03 01:57:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2022-11-03 01:57:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:02,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:02,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:02,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:02,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1649642301, now seen corresponding path program 1 times [2022-11-03 01:57:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:02,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589963333] [2022-11-03 01:57:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:02,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:02,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:02,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:57:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:02,604 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 01:57:02,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:02,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589963333] [2022-11-03 01:57:02,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589963333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:02,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:02,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700387362] [2022-11-03 01:57:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:02,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:02,608 INFO L87 Difference]: Start difference. First operand 85 states and 122 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:02,676 INFO L93 Difference]: Finished difference Result 317 states and 462 transitions. [2022-11-03 01:57:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:02,679 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:57:02,679 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:02,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:02,681 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 329 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:02,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 456 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 87. [2022-11-03 01:57:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.441860465116279) internal successors, (124), 86 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-11-03 01:57:02,694 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 17 [2022-11-03 01:57:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:02,695 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-11-03 01:57:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-11-03 01:57:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:02,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:02,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:02,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:02,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:02,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1256615291, now seen corresponding path program 1 times [2022-11-03 01:57:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:02,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416608297] [2022-11-03 01:57:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:02,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:02,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:02,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:02,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:57:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:03,222 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 01:57:03,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:03,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416608297] [2022-11-03 01:57:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416608297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:03,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:03,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334100145] [2022-11-03 01:57:03,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:03,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:03,229 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:03,294 INFO L93 Difference]: Finished difference Result 317 states and 461 transitions. [2022-11-03 01:57:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:03,297 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:57:03,297 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:03,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:03,309 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 323 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:03,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 455 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 89. [2022-11-03 01:57:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 88 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2022-11-03 01:57:03,333 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 17 [2022-11-03 01:57:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:03,334 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2022-11-03 01:57:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2022-11-03 01:57:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:03,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:03,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:03,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:03,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash 447268665, now seen corresponding path program 1 times [2022-11-03 01:57:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:03,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907989143] [2022-11-03 01:57:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:03,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:03,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 01:57:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:03,890 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 01:57:03,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:03,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:03,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907989143] [2022-11-03 01:57:03,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907989143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:03,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:03,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:03,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430201621] [2022-11-03 01:57:03,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:03,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:03,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:03,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:03,894 INFO L87 Difference]: Start difference. First operand 89 states and 126 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:03,953 INFO L93 Difference]: Finished difference Result 317 states and 460 transitions. [2022-11-03 01:57:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:03,955 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:57:03,955 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:03,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:03,957 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 317 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:03,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 454 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 91. [2022-11-03 01:57:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4222222222222223) internal successors, (128), 90 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2022-11-03 01:57:03,966 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 17 [2022-11-03 01:57:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:03,966 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2022-11-03 01:57:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2022-11-03 01:57:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:03,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:03,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:03,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:04,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:04,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:04,184 INFO L85 PathProgramCache]: Analyzing trace with hash 504526967, now seen corresponding path program 1 times [2022-11-03 01:57:04,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:04,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859318704] [2022-11-03 01:57:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:04,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:04,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:04,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 01:57:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:04,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:04,501 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 01:57:04,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:04,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:04,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859318704] [2022-11-03 01:57:04,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859318704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:04,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:04,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070743853] [2022-11-03 01:57:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:04,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:04,506 INFO L87 Difference]: Start difference. First operand 91 states and 128 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:04,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:04,584 INFO L93 Difference]: Finished difference Result 317 states and 459 transitions. [2022-11-03 01:57:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:04,587 INFO L225 Difference]: With dead ends: 317 [2022-11-03 01:57:04,587 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 01:57:04,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 01:57:04,591 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 311 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:04,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 453 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 01:57:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 93. [2022-11-03 01:57:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 92 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2022-11-03 01:57:04,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 17 [2022-11-03 01:57:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:04,615 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2022-11-03 01:57:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2022-11-03 01:57:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:57:04,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:04,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:04,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:04,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 504586549, now seen corresponding path program 1 times [2022-11-03 01:57:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:04,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139506445] [2022-11-03 01:57:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:04,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:04,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:57:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:57:05,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:06,055 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 01:57:06,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:06,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139506445] [2022-11-03 01:57:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139506445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:06,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:06,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 01:57:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143735876] [2022-11-03 01:57:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:06,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:57:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:57:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:57:06,058 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:13,834 INFO L93 Difference]: Finished difference Result 652 states and 940 transitions. [2022-11-03 01:57:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 01:57:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-11-03 01:57:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:13,839 INFO L225 Difference]: With dead ends: 652 [2022-11-03 01:57:13,839 INFO L226 Difference]: Without dead ends: 650 [2022-11-03 01:57:13,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=971, Invalid=3585, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:57:13,843 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 1446 mSDsluCounter, 2572 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 2698 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:13,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 2698 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 01:57:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-03 01:57:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 105. [2022-11-03 01:57:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4134615384615385) internal successors, (147), 104 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 147 transitions. [2022-11-03 01:57:13,854 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 147 transitions. Word has length 17 [2022-11-03 01:57:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:13,854 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 147 transitions. [2022-11-03 01:57:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 147 transitions. [2022-11-03 01:57:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:13,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:13,858 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] [2022-11-03 01:57:13,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:14,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:14,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash -205572357, now seen corresponding path program 1 times [2022-11-03 01:57:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:14,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209160668] [2022-11-03 01:57:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:14,091 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:14,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:57:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:15,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:15,011 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209160668] [2022-11-03 01:57:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209160668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:15,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:15,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:15,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149035466] [2022-11-03 01:57:15,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:15,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:15,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:15,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:15,014 INFO L87 Difference]: Start difference. First operand 105 states and 147 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:15,384 INFO L93 Difference]: Finished difference Result 351 states and 507 transitions. [2022-11-03 01:57:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:15,388 INFO L225 Difference]: With dead ends: 351 [2022-11-03 01:57:15,388 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 01:57:15,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 01:57:15,389 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 296 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:15,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 398 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:57:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 01:57:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 109. [2022-11-03 01:57:15,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 108 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2022-11-03 01:57:15,397 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 94 [2022-11-03 01:57:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:15,398 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2022-11-03 01:57:15,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2022-11-03 01:57:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:15,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:15,400 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] [2022-11-03 01:57:15,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:15,611 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash -178506755, now seen corresponding path program 1 times [2022-11-03 01:57:15,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:15,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738650809] [2022-11-03 01:57:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:15,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:15,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:15,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 01:57:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:16,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:16,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:16,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738650809] [2022-11-03 01:57:16,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738650809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:16,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:16,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:16,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568870978] [2022-11-03 01:57:16,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:16,476 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:16,840 INFO L93 Difference]: Finished difference Result 380 states and 546 transitions. [2022-11-03 01:57:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:16,843 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:16,843 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:16,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:16,844 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 411 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:16,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 608 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:57:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:16,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 117. [2022-11-03 01:57:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.396551724137931) internal successors, (162), 116 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2022-11-03 01:57:16,853 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 94 [2022-11-03 01:57:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:16,853 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2022-11-03 01:57:16,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2022-11-03 01:57:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:16,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:16,856 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] [2022-11-03 01:57:16,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:17,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -671132929, now seen corresponding path program 1 times [2022-11-03 01:57:17,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784173202] [2022-11-03 01:57:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:17,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:17,073 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:17,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 01:57:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:17,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:17,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784173202] [2022-11-03 01:57:17,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784173202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:17,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:17,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706852173] [2022-11-03 01:57:17,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:17,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:17,935 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:18,426 INFO L93 Difference]: Finished difference Result 380 states and 545 transitions. [2022-11-03 01:57:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:18,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:18,428 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:18,428 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:18,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:18,429 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 404 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:18,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 604 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 119. [2022-11-03 01:57:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3898305084745763) internal successors, (164), 118 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2022-11-03 01:57:18,445 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 94 [2022-11-03 01:57:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:18,446 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2022-11-03 01:57:18,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2022-11-03 01:57:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:18,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:18,449 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] [2022-11-03 01:57:18,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:18,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1887286655, now seen corresponding path program 1 times [2022-11-03 01:57:18,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:18,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077664326] [2022-11-03 01:57:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:18,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:57:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:19,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:19,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077664326] [2022-11-03 01:57:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077664326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:19,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608749657] [2022-11-03 01:57:19,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:19,473 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:19,947 INFO L93 Difference]: Finished difference Result 380 states and 544 transitions. [2022-11-03 01:57:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:19,950 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:19,950 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:19,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:19,952 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 397 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:19,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 600 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 121. [2022-11-03 01:57:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 120 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2022-11-03 01:57:19,961 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 94 [2022-11-03 01:57:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:19,961 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2022-11-03 01:57:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2022-11-03 01:57:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:19,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:19,963 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] [2022-11-03 01:57:19,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 01:57:20,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:20,178 INFO L85 PathProgramCache]: Analyzing trace with hash 721500803, now seen corresponding path program 1 times [2022-11-03 01:57:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:20,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243193168] [2022-11-03 01:57:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:20,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:20,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 01:57:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:20,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:21,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:21,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243193168] [2022-11-03 01:57:21,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243193168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:21,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:21,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642462925] [2022-11-03 01:57:21,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:21,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:21,052 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:21,520 INFO L93 Difference]: Finished difference Result 380 states and 543 transitions. [2022-11-03 01:57:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:21,524 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:21,524 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:21,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:21,526 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 390 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:21,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 596 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 123. [2022-11-03 01:57:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3770491803278688) internal successors, (168), 122 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 168 transitions. [2022-11-03 01:57:21,535 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 168 transitions. Word has length 94 [2022-11-03 01:57:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:21,535 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 168 transitions. [2022-11-03 01:57:21,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 168 transitions. [2022-11-03 01:57:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:21,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:21,537 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] [2022-11-03 01:57:21,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:21,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,751 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash 304104197, now seen corresponding path program 1 times [2022-11-03 01:57:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:21,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006483639] [2022-11-03 01:57:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:21,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:21,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 01:57:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:22,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:22,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:22,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006483639] [2022-11-03 01:57:22,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006483639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:22,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:22,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421737719] [2022-11-03 01:57:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:22,559 INFO L87 Difference]: Start difference. First operand 123 states and 168 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:23,011 INFO L93 Difference]: Finished difference Result 380 states and 542 transitions. [2022-11-03 01:57:23,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:23,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:23,014 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:23,014 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:23,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:23,015 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 383 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:23,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 592 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 125. [2022-11-03 01:57:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3709677419354838) internal successors, (170), 124 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2022-11-03 01:57:23,023 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 94 [2022-11-03 01:57:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:23,023 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2022-11-03 01:57:23,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2022-11-03 01:57:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:23,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:23,025 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] [2022-11-03 01:57:23,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:23,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2029288441, now seen corresponding path program 1 times [2022-11-03 01:57:23,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:23,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757609055] [2022-11-03 01:57:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:23,228 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:23,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:57:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:24,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:24,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:24,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757609055] [2022-11-03 01:57:24,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757609055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:24,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:24,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078346815] [2022-11-03 01:57:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:24,054 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:24,480 INFO L93 Difference]: Finished difference Result 380 states and 541 transitions. [2022-11-03 01:57:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:24,482 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:24,482 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:24,484 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 376 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:24,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 588 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 127. [2022-11-03 01:57:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3650793650793651) internal successors, (172), 126 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 172 transitions. [2022-11-03 01:57:24,493 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 172 transitions. Word has length 94 [2022-11-03 01:57:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,493 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 172 transitions. [2022-11-03 01:57:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 172 transitions. [2022-11-03 01:57:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:24,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,495 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] [2022-11-03 01:57:24,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1468588663, now seen corresponding path program 1 times [2022-11-03 01:57:24,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:24,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476018095] [2022-11-03 01:57:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:24,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 01:57:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:25,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:25,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:25,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:25,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476018095] [2022-11-03 01:57:25,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476018095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:25,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:25,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914483342] [2022-11-03 01:57:25,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:25,474 INFO L87 Difference]: Start difference. First operand 127 states and 172 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:25,833 INFO L93 Difference]: Finished difference Result 380 states and 540 transitions. [2022-11-03 01:57:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:25,836 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:25,837 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:25,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:25,838 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 369 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:25,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 584 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:57:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 129. [2022-11-03 01:57:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2022-11-03 01:57:25,849 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 94 [2022-11-03 01:57:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2022-11-03 01:57:25,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:25,850 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2022-11-03 01:57:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:25,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:25,852 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] [2022-11-03 01:57:25,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:26,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:26,062 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash -207671413, now seen corresponding path program 1 times [2022-11-03 01:57:26,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:26,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949713557] [2022-11-03 01:57:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:26,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:26,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:26,066 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:26,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 01:57:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:26,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:26,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:26,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949713557] [2022-11-03 01:57:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949713557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:26,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:57:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625118135] [2022-11-03 01:57:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:57:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:57:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:57:26,834 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:27,291 INFO L93 Difference]: Finished difference Result 380 states and 539 transitions. [2022-11-03 01:57:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:27,294 INFO L225 Difference]: With dead ends: 380 [2022-11-03 01:57:27,294 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 01:57:27,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:57:27,295 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 357 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:27,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 577 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 01:57:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 133. [2022-11-03 01:57:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.356060606060606) internal successors, (179), 132 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 179 transitions. [2022-11-03 01:57:27,313 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 179 transitions. Word has length 94 [2022-11-03 01:57:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:27,314 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 179 transitions. [2022-11-03 01:57:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 179 transitions. [2022-11-03 01:57:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:27,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:27,316 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] [2022-11-03 01:57:27,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:27,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:27,530 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:27,531 INFO L85 PathProgramCache]: Analyzing trace with hash 236229261, now seen corresponding path program 1 times [2022-11-03 01:57:27,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:27,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370954975] [2022-11-03 01:57:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:27,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:27,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:27,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:57:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 01:57:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:29,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:29,416 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370954975] [2022-11-03 01:57:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370954975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:29,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:29,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-03 01:57:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993280803] [2022-11-03 01:57:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:29,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 01:57:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 01:57:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-11-03 01:57:29,419 INFO L87 Difference]: Start difference. First operand 133 states and 179 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:34,867 INFO L93 Difference]: Finished difference Result 740 states and 1053 transitions. [2022-11-03 01:57:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-03 01:57:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:34,872 INFO L225 Difference]: With dead ends: 740 [2022-11-03 01:57:34,872 INFO L226 Difference]: Without dead ends: 649 [2022-11-03 01:57:34,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=908, Invalid=4642, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 01:57:34,876 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 2635 mSDsluCounter, 3328 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 3448 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:34,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2635 Valid, 3448 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 01:57:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-03 01:57:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 153. [2022-11-03 01:57:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-11-03 01:57:34,899 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 94 [2022-11-03 01:57:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:34,899 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-11-03 01:57:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-11-03 01:57:34,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:34,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:34,901 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] [2022-11-03 01:57:34,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1792356849, now seen corresponding path program 1 times [2022-11-03 01:57:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:35,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892110777] [2022-11-03 01:57:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:35,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:35,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 01:57:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:35,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:35,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892110777] [2022-11-03 01:57:35,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892110777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:35,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:35,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:35,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138252236] [2022-11-03 01:57:35,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:35,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:35,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:35,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:35,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:35,745 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:35,813 INFO L93 Difference]: Finished difference Result 371 states and 519 transitions. [2022-11-03 01:57:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:35,815 INFO L225 Difference]: With dead ends: 371 [2022-11-03 01:57:35,815 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 01:57:35,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 01:57:35,817 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 218 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:35,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 441 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 01:57:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 157. [2022-11-03 01:57:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.314102564102564) internal successors, (205), 156 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2022-11-03 01:57:35,828 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 94 [2022-11-03 01:57:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:35,828 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2022-11-03 01:57:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2022-11-03 01:57:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:35,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:35,830 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] [2022-11-03 01:57:35,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:36,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:36,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1807875567, now seen corresponding path program 1 times [2022-11-03 01:57:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7426788] [2022-11-03 01:57:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:36,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:36,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:36,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 01:57:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:36,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:36,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7426788] [2022-11-03 01:57:36,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7426788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:36,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:36,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588469181] [2022-11-03 01:57:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:36,812 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:36,965 INFO L93 Difference]: Finished difference Result 371 states and 518 transitions. [2022-11-03 01:57:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:36,967 INFO L225 Difference]: With dead ends: 371 [2022-11-03 01:57:36,967 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 01:57:36,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 01:57:36,969 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 212 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:36,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 440 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 01:57:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 159. [2022-11-03 01:57:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 158 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 207 transitions. [2022-11-03 01:57:36,979 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 207 transitions. Word has length 94 [2022-11-03 01:57:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:36,980 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 207 transitions. [2022-11-03 01:57:36,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 207 transitions. [2022-11-03 01:57:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:36,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:36,982 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] [2022-11-03 01:57:37,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:37,206 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:37,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2134003347, now seen corresponding path program 1 times [2022-11-03 01:57:37,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:37,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012206559] [2022-11-03 01:57:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:37,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:37,209 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:37,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 01:57:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:57:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:37,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:37,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:37,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012206559] [2022-11-03 01:57:37,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012206559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:37,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:37,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320268385] [2022-11-03 01:57:37,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:37,877 INFO L87 Difference]: Start difference. First operand 159 states and 207 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:37,938 INFO L93 Difference]: Finished difference Result 371 states and 517 transitions. [2022-11-03 01:57:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:57:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:37,940 INFO L225 Difference]: With dead ends: 371 [2022-11-03 01:57:37,940 INFO L226 Difference]: Without dead ends: 280 [2022-11-03 01:57:37,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 01:57:37,942 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 206 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:37,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 436 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:57:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-03 01:57:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 161. [2022-11-03 01:57:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2022-11-03 01:57:37,952 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 94 [2022-11-03 01:57:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:37,953 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2022-11-03 01:57:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2022-11-03 01:57:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:37,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:37,955 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] [2022-11-03 01:57:37,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:38,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:38,166 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1267477611, now seen corresponding path program 1 times [2022-11-03 01:57:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:38,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871974869] [2022-11-03 01:57:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:38,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:38,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:38,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 01:57:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:57:38,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:38,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:38,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871974869] [2022-11-03 01:57:38,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871974869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:38,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:38,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:38,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015242416] [2022-11-03 01:57:38,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:38,861 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:38,964 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2022-11-03 01:57:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:38,967 INFO L225 Difference]: With dead ends: 257 [2022-11-03 01:57:38,967 INFO L226 Difference]: Without dead ends: 166 [2022-11-03 01:57:38,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 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 01:57:38,968 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 177 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:38,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 220 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:57:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-03 01:57:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2022-11-03 01:57:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3) internal successors, (208), 160 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2022-11-03 01:57:38,984 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 94 [2022-11-03 01:57:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:38,984 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2022-11-03 01:57:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2022-11-03 01:57:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:38,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:38,986 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] [2022-11-03 01:57:39,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:39,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,210 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1182122519, now seen corresponding path program 1 times [2022-11-03 01:57:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:39,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399195776] [2022-11-03 01:57:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:39,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:39,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:39,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:39,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 01:57:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:40,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:40,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399195776] [2022-11-03 01:57:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399195776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:40,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:40,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370597086] [2022-11-03 01:57:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:40,085 INFO L87 Difference]: Start difference. First operand 161 states and 208 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:40,786 INFO L93 Difference]: Finished difference Result 438 states and 609 transitions. [2022-11-03 01:57:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:40,788 INFO L225 Difference]: With dead ends: 438 [2022-11-03 01:57:40,789 INFO L226 Difference]: Without dead ends: 347 [2022-11-03 01:57:40,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:40,790 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 374 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:40,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 712 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:40,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-03 01:57:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 169. [2022-11-03 01:57:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2976190476190477) internal successors, (218), 168 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 01:57:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2022-11-03 01:57:40,801 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 94 [2022-11-03 01:57:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:40,802 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2022-11-03 01:57:40,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2022-11-03 01:57:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:40,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:40,804 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] [2022-11-03 01:57:40,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:41,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:41,024 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:41,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1841654041, now seen corresponding path program 1 times [2022-11-03 01:57:41,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:41,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923208395] [2022-11-03 01:57:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:41,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:41,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:41,027 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:41,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 01:57:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:41,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:41,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923208395] [2022-11-03 01:57:41,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923208395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:41,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:41,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818641520] [2022-11-03 01:57:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:41,930 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:42,445 INFO L93 Difference]: Finished difference Result 353 states and 484 transitions. [2022-11-03 01:57:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:42,447 INFO L225 Difference]: With dead ends: 353 [2022-11-03 01:57:42,447 INFO L226 Difference]: Without dead ends: 262 [2022-11-03 01:57:42,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:42,448 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 448 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:42,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 502 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-03 01:57:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2022-11-03 01:57:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 170 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 220 transitions. [2022-11-03 01:57:42,459 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 220 transitions. Word has length 94 [2022-11-03 01:57:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:42,459 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 220 transitions. [2022-11-03 01:57:42,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 220 transitions. [2022-11-03 01:57:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:42,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:42,460 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] [2022-11-03 01:57:42,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 01:57:42,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,661 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash 997648539, now seen corresponding path program 1 times [2022-11-03 01:57:42,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949340457] [2022-11-03 01:57:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:42,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:42,665 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:42,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 01:57:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:43,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:43,591 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949340457] [2022-11-03 01:57:43,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949340457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:43,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:43,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960806241] [2022-11-03 01:57:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:43,594 INFO L87 Difference]: Start difference. First operand 171 states and 220 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:44,266 INFO L93 Difference]: Finished difference Result 449 states and 619 transitions. [2022-11-03 01:57:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:44,268 INFO L225 Difference]: With dead ends: 449 [2022-11-03 01:57:44,269 INFO L226 Difference]: Without dead ends: 356 [2022-11-03 01:57:44,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:44,270 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 365 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:44,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 709 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-03 01:57:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 175. [2022-11-03 01:57:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2873563218390804) internal successors, (224), 174 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 224 transitions. [2022-11-03 01:57:44,282 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 224 transitions. Word has length 94 [2022-11-03 01:57:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:44,282 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 224 transitions. [2022-11-03 01:57:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 224 transitions. [2022-11-03 01:57:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:44,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:44,284 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] [2022-11-03 01:57:44,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 01:57:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:44,511 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 925261981, now seen corresponding path program 1 times [2022-11-03 01:57:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029126300] [2022-11-03 01:57:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:44,514 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:44,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 01:57:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:45,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:45,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:45,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029126300] [2022-11-03 01:57:45,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029126300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:45,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:45,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031854440] [2022-11-03 01:57:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:45,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:45,402 INFO L87 Difference]: Start difference. First operand 175 states and 224 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:46,031 INFO L93 Difference]: Finished difference Result 452 states and 622 transitions. [2022-11-03 01:57:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:46,034 INFO L225 Difference]: With dead ends: 452 [2022-11-03 01:57:46,034 INFO L226 Difference]: Without dead ends: 359 [2022-11-03 01:57:46,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:46,036 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 362 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:46,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 708 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-03 01:57:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 177. [2022-11-03 01:57:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.2840909090909092) internal successors, (226), 176 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2022-11-03 01:57:46,047 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 94 [2022-11-03 01:57:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:46,048 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2022-11-03 01:57:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2022-11-03 01:57:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:46,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:46,050 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] [2022-11-03 01:57:46,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:46,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:46,266 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1626861855, now seen corresponding path program 1 times [2022-11-03 01:57:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:46,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017769324] [2022-11-03 01:57:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:46,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:46,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:46,268 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 01:57:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:47,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:47,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:47,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017769324] [2022-11-03 01:57:47,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017769324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:47,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:47,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586524812] [2022-11-03 01:57:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:47,152 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:47,821 INFO L93 Difference]: Finished difference Result 454 states and 624 transitions. [2022-11-03 01:57:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:47,823 INFO L225 Difference]: With dead ends: 454 [2022-11-03 01:57:47,823 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 01:57:47,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:47,825 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 359 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:47,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 707 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 01:57:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 179. [2022-11-03 01:57:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.2808988764044944) internal successors, (228), 178 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 228 transitions. [2022-11-03 01:57:47,837 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 228 transitions. Word has length 94 [2022-11-03 01:57:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:47,837 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 228 transitions. [2022-11-03 01:57:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 228 transitions. [2022-11-03 01:57:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:47,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:47,839 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] [2022-11-03 01:57:47,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-03 01:57:48,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:48,066 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1281902047, now seen corresponding path program 1 times [2022-11-03 01:57:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727248930] [2022-11-03 01:57:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:48,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:48,069 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:48,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 01:57:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:48,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:48,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727248930] [2022-11-03 01:57:48,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727248930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:48,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967372686] [2022-11-03 01:57:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:48,984 INFO L87 Difference]: Start difference. First operand 179 states and 228 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:49,557 INFO L93 Difference]: Finished difference Result 367 states and 498 transitions. [2022-11-03 01:57:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:49,559 INFO L225 Difference]: With dead ends: 367 [2022-11-03 01:57:49,559 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 01:57:49,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:49,560 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 432 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:49,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 518 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:57:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 01:57:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 181. [2022-11-03 01:57:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2777777777777777) internal successors, (230), 180 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 230 transitions. [2022-11-03 01:57:49,572 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 230 transitions. Word has length 94 [2022-11-03 01:57:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 230 transitions. [2022-11-03 01:57:49,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 230 transitions. [2022-11-03 01:57:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:49,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:49,574 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] [2022-11-03 01:57:49,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:49,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:49,802 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:49,802 INFO L85 PathProgramCache]: Analyzing trace with hash 641325987, now seen corresponding path program 1 times [2022-11-03 01:57:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:49,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427416974] [2022-11-03 01:57:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:49,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:49,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:49,805 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:49,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 01:57:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:50,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:50,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:50,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427416974] [2022-11-03 01:57:50,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427416974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:50,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001536553] [2022-11-03 01:57:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:50,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:50,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:50,807 INFO L87 Difference]: Start difference. First operand 181 states and 230 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:51,460 INFO L93 Difference]: Finished difference Result 465 states and 635 transitions. [2022-11-03 01:57:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:51,471 INFO L225 Difference]: With dead ends: 465 [2022-11-03 01:57:51,471 INFO L226 Difference]: Without dead ends: 370 [2022-11-03 01:57:51,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:51,472 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 353 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:51,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 705 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:51,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-03 01:57:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 185. [2022-11-03 01:57:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2717391304347827) internal successors, (234), 184 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 234 transitions. [2022-11-03 01:57:51,486 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 234 transitions. Word has length 94 [2022-11-03 01:57:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:51,487 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 234 transitions. [2022-11-03 01:57:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 234 transitions. [2022-11-03 01:57:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:51,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:51,488 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] [2022-11-03 01:57:51,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:51,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:51,714 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash 781874597, now seen corresponding path program 1 times [2022-11-03 01:57:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:51,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112431247] [2022-11-03 01:57:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:51,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:51,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:51,716 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:51,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 01:57:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:52,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:57:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:52,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:52,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:52,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112431247] [2022-11-03 01:57:52,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112431247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:52,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:52,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:52,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428125191] [2022-11-03 01:57:52,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:52,654 INFO L87 Difference]: Start difference. First operand 185 states and 234 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:53,136 INFO L93 Difference]: Finished difference Result 378 states and 509 transitions. [2022-11-03 01:57:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:57:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:53,139 INFO L225 Difference]: With dead ends: 378 [2022-11-03 01:57:53,140 INFO L226 Difference]: Without dead ends: 283 [2022-11-03 01:57:53,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:53,141 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 418 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:53,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 531 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:57:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-03 01:57:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 187. [2022-11-03 01:57:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2688172043010753) internal successors, (236), 186 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 236 transitions. [2022-11-03 01:57:53,157 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 236 transitions. Word has length 94 [2022-11-03 01:57:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:53,158 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 236 transitions. [2022-11-03 01:57:53,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 236 transitions. [2022-11-03 01:57:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:53,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:53,159 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] [2022-11-03 01:57:53,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:53,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:53,386 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1204576423, now seen corresponding path program 1 times [2022-11-03 01:57:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894285103] [2022-11-03 01:57:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:53,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:53,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:53,389 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 01:57:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:54,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:54,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:54,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894285103] [2022-11-03 01:57:54,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894285103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768251510] [2022-11-03 01:57:54,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:54,346 INFO L87 Difference]: Start difference. First operand 187 states and 236 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:54,980 INFO L93 Difference]: Finished difference Result 576 states and 788 transitions. [2022-11-03 01:57:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:57:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:54,984 INFO L225 Difference]: With dead ends: 576 [2022-11-03 01:57:54,984 INFO L226 Difference]: Without dead ends: 479 [2022-11-03 01:57:54,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:54,986 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 464 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:54,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 767 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-03 01:57:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 195. [2022-11-03 01:57:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.268041237113402) internal successors, (246), 194 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 246 transitions. [2022-11-03 01:57:54,998 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 246 transitions. Word has length 94 [2022-11-03 01:57:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:54,999 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 246 transitions. [2022-11-03 01:57:54,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:54,999 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 246 transitions. [2022-11-03 01:57:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:55,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:55,001 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] [2022-11-03 01:57:55,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:55,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:55,218 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash -484367319, now seen corresponding path program 1 times [2022-11-03 01:57:55,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:55,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877523096] [2022-11-03 01:57:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:55,221 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:55,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 01:57:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:57:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:56,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:57:56,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877523096] [2022-11-03 01:57:56,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877523096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:56,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:56,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 01:57:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844027117] [2022-11-03 01:57:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:56,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:56,225 INFO L87 Difference]: Start difference. First operand 195 states and 246 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:56,921 INFO L93 Difference]: Finished difference Result 582 states and 795 transitions. [2022-11-03 01:57:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 01:57:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:57:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:56,926 INFO L225 Difference]: With dead ends: 582 [2022-11-03 01:57:56,926 INFO L226 Difference]: Without dead ends: 485 [2022-11-03 01:57:56,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:57:56,927 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 459 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:56,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 771 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:57:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-03 01:57:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 199. [2022-11-03 01:57:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.2676767676767677) internal successors, (251), 198 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 251 transitions. [2022-11-03 01:57:56,941 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 251 transitions. Word has length 94 [2022-11-03 01:57:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:56,941 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 251 transitions. [2022-11-03 01:57:56,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:57:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 251 transitions. [2022-11-03 01:57:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:57:56,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:56,943 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] [2022-11-03 01:57:56,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:57,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:57:57,170 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2072715221, now seen corresponding path program 1 times [2022-11-03 01:57:57,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:57:57,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748550436] [2022-11-03 01:57:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:57:57,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:57:57,172 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:57:57,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 01:57:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:57,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:57,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:58,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:57:58,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748550436] [2022-11-03 01:57:58,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748550436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:58,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180317345] [2022-11-03 01:57:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:58,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:57:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:57:58,078 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:57:58,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 01:57:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:58,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:59,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1180317345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:59,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858200244] [2022-11-03 01:57:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:59,022 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:59,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 01:57:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:57:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:57:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858200244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:59,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:57:59,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2022-11-03 01:57:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367316281] [2022-11-03 01:57:59,808 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:57:59,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:57:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:57:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:57:59,810 INFO L87 Difference]: Start difference. First operand 199 states and 251 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:00,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:00,059 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2022-11-03 01:58:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:58:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:58:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:00,062 INFO L225 Difference]: With dead ends: 476 [2022-11-03 01:58:00,062 INFO L226 Difference]: Without dead ends: 379 [2022-11-03 01:58:00,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:58:00,063 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 624 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:00,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 741 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-03 01:58:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 204. [2022-11-03 01:58:00,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.2660098522167487) internal successors, (257), 203 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 257 transitions. [2022-11-03 01:58:00,083 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 257 transitions. Word has length 94 [2022-11-03 01:58:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:00,083 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 257 transitions. [2022-11-03 01:58:00,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 257 transitions. [2022-11-03 01:58:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:58:00,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:00,085 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:00,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:00,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:00,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:00,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:00,710 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:00,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1211134825, now seen corresponding path program 1 times [2022-11-03 01:58:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260958872] [2022-11-03 01:58:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:00,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:00,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:00,713 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:00,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 01:58:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:58:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:01,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:01,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:01,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260958872] [2022-11-03 01:58:01,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260958872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:01,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666760540] [2022-11-03 01:58:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:01,673 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:01,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:01,678 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:01,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 01:58:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:02,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:58:02,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:02,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [666760540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564556449] [2022-11-03 01:58:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:02,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:02,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:02,636 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:02,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-03 01:58:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:58:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:03,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:03,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564556449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:03,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:03,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2022-11-03 01:58:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308788796] [2022-11-03 01:58:03,470 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:03,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:58:03,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:58:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:58:03,472 INFO L87 Difference]: Start difference. First operand 204 states and 257 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:03,635 INFO L93 Difference]: Finished difference Result 477 states and 644 transitions. [2022-11-03 01:58:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:58:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:58:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:03,637 INFO L225 Difference]: With dead ends: 477 [2022-11-03 01:58:03,638 INFO L226 Difference]: Without dead ends: 380 [2022-11-03 01:58:03,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:58:03,639 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 617 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:03,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 742 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-03 01:58:03,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 206. [2022-11-03 01:58:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.2634146341463415) internal successors, (259), 205 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 259 transitions. [2022-11-03 01:58:03,650 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 259 transitions. Word has length 94 [2022-11-03 01:58:03,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:03,650 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 259 transitions. [2022-11-03 01:58:03,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 259 transitions. [2022-11-03 01:58:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:58:03,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:03,651 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] [2022-11-03 01:58:03,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:03,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-03 01:58:04,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 01:58:04,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:04,262 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1469300263, now seen corresponding path program 1 times [2022-11-03 01:58:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:04,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289419157] [2022-11-03 01:58:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:04,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:04,265 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:04,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-03 01:58:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:58:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:05,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:06,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289419157] [2022-11-03 01:58:06,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289419157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:06,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263763396] [2022-11-03 01:58:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:06,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:06,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:06,738 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:06,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-03 01:58:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:58:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263763396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:08,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526788563] [2022-11-03 01:58:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:08,914 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:08,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-03 01:58:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:09,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:58:09,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:09,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:10,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526788563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:10,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:10,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-03 01:58:10,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851143784] [2022-11-03 01:58:10,454 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 01:58:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 01:58:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:58:10,457 INFO L87 Difference]: Start difference. First operand 206 states and 259 transitions. Second operand has 13 states, 13 states have (on average 14.076923076923077) internal successors, (183), 13 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:10,959 INFO L93 Difference]: Finished difference Result 387 states and 505 transitions. [2022-11-03 01:58:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:58:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.076923076923077) internal successors, (183), 13 states have internal predecessors, (183), 0 states have call successors, (0), 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 94 [2022-11-03 01:58:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:10,962 INFO L225 Difference]: With dead ends: 387 [2022-11-03 01:58:10,962 INFO L226 Difference]: Without dead ends: 290 [2022-11-03 01:58:10,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 544 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:58:10,963 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 139 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:10,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 774 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-03 01:58:10,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-03 01:58:10,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-11-03 01:58:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.2629757785467128) internal successors, (365), 289 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 365 transitions. [2022-11-03 01:58:10,990 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 365 transitions. Word has length 94 [2022-11-03 01:58:10,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:10,991 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 365 transitions. [2022-11-03 01:58:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.076923076923077) internal successors, (183), 13 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 365 transitions. [2022-11-03 01:58:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:58:10,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:10,992 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] [2022-11-03 01:58:10,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:11,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-03 01:58:11,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-03 01:58:11,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:11,593 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1526558565, now seen corresponding path program 1 times [2022-11-03 01:58:11,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946408197] [2022-11-03 01:58:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:11,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:11,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:11,596 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:11,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 01:58:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:58:12,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:13,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:13,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946408197] [2022-11-03 01:58:13,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946408197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:13,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [282479229] [2022-11-03 01:58:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:13,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:13,812 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:13,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 01:58:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:58:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:14,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:58:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [282479229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:58:14,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 19 [2022-11-03 01:58:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378532916] [2022-11-03 01:58:14,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:14,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:58:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:58:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:58:14,623 INFO L87 Difference]: Start difference. First operand 290 states and 365 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:15,440 INFO L93 Difference]: Finished difference Result 685 states and 918 transitions. [2022-11-03 01:58:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 01:58:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:58:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:15,442 INFO L225 Difference]: With dead ends: 685 [2022-11-03 01:58:15,442 INFO L226 Difference]: Without dead ends: 539 [2022-11-03 01:58:15,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 01:58:15,443 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 977 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:15,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 683 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-03 01:58:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 292. [2022-11-03 01:58:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 291 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 366 transitions. [2022-11-03 01:58:15,469 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 366 transitions. Word has length 94 [2022-11-03 01:58:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:15,470 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 366 transitions. [2022-11-03 01:58:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 366 transitions. [2022-11-03 01:58:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:58:15,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:15,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:15,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-03 01:58:15,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 01:58:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:15,876 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1526618147, now seen corresponding path program 1 times [2022-11-03 01:58:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891825909] [2022-11-03 01:58:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:15,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:15,880 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:15,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 01:58:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:58:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:18,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:23,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:58:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891825909] [2022-11-03 01:58:23,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891825909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:23,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337492812] [2022-11-03 01:58:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:23,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:58:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:58:23,398 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:58:23,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 01:58:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:24,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 01:58:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:28,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:33,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337492812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522730281] [2022-11-03 01:58:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:33,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:33,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:33,907 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:33,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 01:58:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 01:58:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:36,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522730281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:37,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:58:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 67 [2022-11-03 01:58:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067283994] [2022-11-03 01:58:37,509 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 01:58:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:58:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 01:58:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=4034, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 01:58:37,513 INFO L87 Difference]: Start difference. First operand 292 states and 366 transitions. Second operand has 67 states, 67 states have (on average 4.731343283582089) internal successors, (317), 67 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 01:58:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:59,131 INFO L93 Difference]: Finished difference Result 1566 states and 2108 transitions. [2022-11-03 01:58:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-03 01:58:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.731343283582089) internal successors, (317), 67 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) Word has length 94 [2022-11-03 01:58:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:59,135 INFO L225 Difference]: With dead ends: 1566 [2022-11-03 01:58:59,135 INFO L226 Difference]: Without dead ends: 1564 [2022-11-03 01:58:59,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 500 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4406 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=3428, Invalid=14662, Unknown=0, NotChecked=0, Total=18090 [2022-11-03 01:58:59,139 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 5258 mSDsluCounter, 7957 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5258 SdHoareTripleChecker+Valid, 8296 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2466 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:59,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5258 Valid, 8296 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1856 Invalid, 0 Unknown, 2466 Unchecked, 5.9s Time] [2022-11-03 01:58:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-11-03 01:58:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 444. [2022-11-03 01:58:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.2595936794582392) internal successors, (558), 443 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 558 transitions. [2022-11-03 01:58:59,176 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 558 transitions. Word has length 94 [2022-11-03 01:58:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 558 transitions. [2022-11-03 01:58:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.731343283582089) internal successors, (317), 67 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 01:58:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 558 transitions. [2022-11-03 01:58:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:58:59,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:59,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:59,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 01:58:59,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-03 01:58:59,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 01:58:59,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:58:59,786 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:59,787 INFO L85 PathProgramCache]: Analyzing trace with hash 717271521, now seen corresponding path program 1 times [2022-11-03 01:58:59,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:58:59,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117977861] [2022-11-03 01:58:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:59,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:58:59,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:58:59,789 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:58:59,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 01:59:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:01,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117977861] [2022-11-03 01:59:01,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117977861] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:01,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:59:01,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-03 01:59:01,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230719643] [2022-11-03 01:59:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:01,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:59:01,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:59:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:59:01,152 INFO L87 Difference]: Start difference. First operand 444 states and 558 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:01,608 INFO L93 Difference]: Finished difference Result 872 states and 1154 transitions. [2022-11-03 01:59:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:59:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:59:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:01,610 INFO L225 Difference]: With dead ends: 872 [2022-11-03 01:59:01,610 INFO L226 Difference]: Without dead ends: 644 [2022-11-03 01:59:01,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:59:01,612 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 612 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:01,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1031 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-11-03 01:59:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-03 01:59:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 450. [2022-11-03 01:59:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2583518930957684) internal successors, (565), 449 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 565 transitions. [2022-11-03 01:59:01,658 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 565 transitions. Word has length 94 [2022-11-03 01:59:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:01,658 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 565 transitions. [2022-11-03 01:59:01,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 565 transitions. [2022-11-03 01:59:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:59:01,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:01,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:01,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 01:59:01,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:01,878 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:01,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1133591137, now seen corresponding path program 1 times [2022-11-03 01:59:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:01,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333673891] [2022-11-03 01:59:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:01,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:01,881 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:01,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 01:59:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:59:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:03,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333673891] [2022-11-03 01:59:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333673891] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:03,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:59:03,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-03 01:59:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012300465] [2022-11-03 01:59:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:03,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:59:03,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:59:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:59:03,309 INFO L87 Difference]: Start difference. First operand 450 states and 565 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:03,607 INFO L93 Difference]: Finished difference Result 878 states and 1158 transitions. [2022-11-03 01:59:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:59:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 01:59:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:03,610 INFO L225 Difference]: With dead ends: 878 [2022-11-03 01:59:03,610 INFO L226 Difference]: Without dead ends: 644 [2022-11-03 01:59:03,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-03 01:59:03,612 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 640 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:03,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 936 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-03 01:59:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-03 01:59:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 450. [2022-11-03 01:59:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2538975501113585) internal successors, (563), 449 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 563 transitions. [2022-11-03 01:59:03,664 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 563 transitions. Word has length 94 [2022-11-03 01:59:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 563 transitions. [2022-11-03 01:59:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 563 transitions. [2022-11-03 01:59:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 01:59:03,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:03,667 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] [2022-11-03 01:59:03,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:03,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,882 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:03,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1045653541, now seen corresponding path program 1 times [2022-11-03 01:59:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:59:03,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034833888] [2022-11-03 01:59:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:03,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:59:03,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:59:03,887 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:59:03,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 01:59:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:04,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 01:59:04,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:06,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:13,028 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:59:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034833888] [2022-11-03 01:59:13,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034833888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230859840] [2022-11-03 01:59:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:59:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:59:13,031 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:59:13,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 01:59:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 01:59:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:19,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:32,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230859840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:32,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3059767] [2022-11-03 01:59:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:32,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:32,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:32,560 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 01:59:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:33,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:59:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:34,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:59:36,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3059767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:36,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:59:36,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 23, 23] total 75 [2022-11-03 01:59:36,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379148596] [2022-11-03 01:59:36,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:36,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-03 01:59:36,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:59:36,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-03 01:59:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=5112, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 01:59:36,430 INFO L87 Difference]: Start difference. First operand 450 states and 563 transitions. Second operand has 75 states, 75 states have (on average 4.226666666666667) internal successors, (317), 75 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 02:00:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:04,834 INFO L93 Difference]: Finished difference Result 1484 states and 1984 transitions. [2022-11-03 02:00:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-03 02:00:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.226666666666667) internal successors, (317), 75 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) Word has length 94 [2022-11-03 02:00:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:04,838 INFO L225 Difference]: With dead ends: 1484 [2022-11-03 02:00:04,838 INFO L226 Difference]: Without dead ends: 1482 [2022-11-03 02:00:04,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 490 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=3739, Invalid=17141, Unknown=0, NotChecked=0, Total=20880 [2022-11-03 02:00:04,843 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 5181 mSDsluCounter, 8820 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5181 SdHoareTripleChecker+Valid, 9092 SdHoareTripleChecker+Invalid, 9532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6684 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:04,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5181 Valid, 9092 Invalid, 9532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2730 Invalid, 0 Unknown, 6684 Unchecked, 8.6s Time] [2022-11-03 02:00:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-11-03 02:00:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 454. [2022-11-03 02:00:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.2560706401766004) internal successors, (569), 453 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 569 transitions. [2022-11-03 02:00:04,900 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 569 transitions. Word has length 94 [2022-11-03 02:00:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:04,901 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 569 transitions. [2022-11-03 02:00:04,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.226666666666667) internal successors, (317), 75 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 02:00:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 569 transitions. [2022-11-03 02:00:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:00:04,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:04,902 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] [2022-11-03 02:00:04,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:05,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 02:00:05,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-03 02:00:05,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:05,524 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1045713123, now seen corresponding path program 1 times [2022-11-03 02:00:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:05,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752395358] [2022-11-03 02:00:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:05,528 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:05,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:00:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:06,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752395358] [2022-11-03 02:00:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752395358] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:06,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:06,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:00:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074838062] [2022-11-03 02:00:06,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:00:06,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:00:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:06,987 INFO L87 Difference]: Start difference. First operand 454 states and 569 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:07,800 INFO L93 Difference]: Finished difference Result 926 states and 1219 transitions. [2022-11-03 02:00:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:00:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 02:00:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:07,804 INFO L225 Difference]: With dead ends: 926 [2022-11-03 02:00:07,804 INFO L226 Difference]: Without dead ends: 688 [2022-11-03 02:00:07,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:07,806 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 543 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:07,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 854 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-03 02:00:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 454. [2022-11-03 02:00:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.2516556291390728) internal successors, (567), 453 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 567 transitions. [2022-11-03 02:00:07,855 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 567 transitions. Word has length 94 [2022-11-03 02:00:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:07,855 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 567 transitions. [2022-11-03 02:00:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 567 transitions. [2022-11-03 02:00:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:00:07,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:07,857 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] [2022-11-03 02:00:07,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:00:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:08,062 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash 236306915, now seen corresponding path program 1 times [2022-11-03 02:00:08,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:08,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558533629] [2022-11-03 02:00:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:08,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:08,064 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:00:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:09,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:09,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:09,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558533629] [2022-11-03 02:00:09,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558533629] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:09,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:09,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:00:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34473972] [2022-11-03 02:00:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:09,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:00:09,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:00:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:09,576 INFO L87 Difference]: Start difference. First operand 454 states and 567 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:10,460 INFO L93 Difference]: Finished difference Result 1099 states and 1448 transitions. [2022-11-03 02:00:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:00:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 02:00:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:10,463 INFO L225 Difference]: With dead ends: 1099 [2022-11-03 02:00:10,463 INFO L226 Difference]: Without dead ends: 861 [2022-11-03 02:00:10,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:00:10,464 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 857 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:10,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 747 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-03 02:00:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 456. [2022-11-03 02:00:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.2483516483516484) internal successors, (568), 455 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 568 transitions. [2022-11-03 02:00:10,517 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 568 transitions. Word has length 94 [2022-11-03 02:00:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:10,518 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 568 transitions. [2022-11-03 02:00:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 568 transitions. [2022-11-03 02:00:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:00:10,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:10,520 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] [2022-11-03 02:00:10,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:10,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:10,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash 652626531, now seen corresponding path program 1 times [2022-11-03 02:00:10,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:10,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605414334] [2022-11-03 02:00:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:10,737 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:10,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:00:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:11,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:11,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:12,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:12,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605414334] [2022-11-03 02:00:12,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605414334] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:12,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:00:12,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:00:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600930955] [2022-11-03 02:00:12,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:00:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:00:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:00:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:12,208 INFO L87 Difference]: Start difference. First operand 456 states and 568 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:12,997 INFO L93 Difference]: Finished difference Result 922 states and 1202 transitions. [2022-11-03 02:00:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:00:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-03 02:00:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:13,000 INFO L225 Difference]: With dead ends: 922 [2022-11-03 02:00:13,001 INFO L226 Difference]: Without dead ends: 682 [2022-11-03 02:00:13,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:00:13,002 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 613 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:13,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 699 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-03 02:00:13,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 456. [2022-11-03 02:00:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.2395604395604396) internal successors, (564), 455 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 564 transitions. [2022-11-03 02:00:13,069 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 564 transitions. Word has length 94 [2022-11-03 02:00:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:13,070 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 564 transitions. [2022-11-03 02:00:13,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 564 transitions. [2022-11-03 02:00:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:00:13,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:13,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:13,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:13,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:00:13,286 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash -156720095, now seen corresponding path program 1 times [2022-11-03 02:00:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:13,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919183989] [2022-11-03 02:00:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:13,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:13,289 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:13,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:00:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:00:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:15,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:20,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919183989] [2022-11-03 02:00:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919183989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [60444880] [2022-11-03 02:00:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:20,630 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:20,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 02:00:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:00:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:26,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [60444880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283190364] [2022-11-03 02:00:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:31,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:31,110 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 02:00:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:31,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:00:31,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:34,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283190364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:34,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:34,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 67 [2022-11-03 02:00:34,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343427840] [2022-11-03 02:00:34,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:34,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:00:34,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:00:34,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=4010, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:00:34,646 INFO L87 Difference]: Start difference. First operand 456 states and 564 transitions. Second operand has 67 states, 67 states have (on average 4.701492537313433) internal successors, (315), 67 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 02:00:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:52,954 INFO L93 Difference]: Finished difference Result 1236 states and 1623 transitions. [2022-11-03 02:00:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 02:00:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.701492537313433) internal successors, (315), 67 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) Word has length 94 [2022-11-03 02:00:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:52,959 INFO L225 Difference]: With dead ends: 1236 [2022-11-03 02:00:52,959 INFO L226 Difference]: Without dead ends: 1234 [2022-11-03 02:00:52,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 494 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3211 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2365, Invalid=11207, Unknown=0, NotChecked=0, Total=13572 [2022-11-03 02:00:52,961 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 2584 mSDsluCounter, 9112 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 9516 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3448 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:52,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2584 Valid, 9516 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2688 Invalid, 0 Unknown, 3448 Unchecked, 7.2s Time] [2022-11-03 02:00:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-11-03 02:00:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 454. [2022-11-03 02:00:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.2384105960264902) internal successors, (561), 453 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 02:00:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 561 transitions. [2022-11-03 02:00:53,020 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 561 transitions. Word has length 94 [2022-11-03 02:00:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:53,020 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 561 transitions. [2022-11-03 02:00:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.701492537313433) internal successors, (315), 67 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 02:00:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 561 transitions. [2022-11-03 02:00:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:00:53,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:53,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:53,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:53,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 02:00:53,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-03 02:00:53,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:53,638 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash 629224869, now seen corresponding path program 1 times [2022-11-03 02:00:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807181073] [2022-11-03 02:00:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:53,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:53,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:53,641 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:53,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 02:00:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:54,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:55,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:00:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807181073] [2022-11-03 02:00:55,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807181073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [920699121] [2022-11-03 02:00:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:55,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:00:55,420 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:00:55,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 02:00:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:56,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:56,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:57,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [920699121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:57,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061692092] [2022-11-03 02:00:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:57,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:57,179 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:57,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 02:00:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:00:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:57,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:00:58,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061692092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:58,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:00:58,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-03 02:00:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599901106] [2022-11-03 02:00:58,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:58,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:00:58,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:00:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:00:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:00:58,393 INFO L87 Difference]: Start difference. First operand 454 states and 561 transitions. Second operand has 13 states, 13 states have (on average 13.76923076923077) internal successors, (179), 13 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:58,747 INFO L93 Difference]: Finished difference Result 696 states and 887 transitions. [2022-11-03 02:00:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:00:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.76923076923077) internal successors, (179), 13 states have internal predecessors, (179), 0 states have call successors, (0), 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 94 [2022-11-03 02:00:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:58,749 INFO L225 Difference]: With dead ends: 696 [2022-11-03 02:00:58,749 INFO L226 Difference]: Without dead ends: 458 [2022-11-03 02:00:58,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 543 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:00:58,750 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 133 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:58,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 890 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-03 02:00:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-03 02:00:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2022-11-03 02:00:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.2319474835886215) internal successors, (563), 457 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 563 transitions. [2022-11-03 02:00:58,798 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 563 transitions. Word has length 94 [2022-11-03 02:00:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 563 transitions. [2022-11-03 02:00:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.76923076923077) internal successors, (179), 13 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 563 transitions. [2022-11-03 02:00:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:00:58,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:58,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:58,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:59,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 02:00:59,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:00:59,414 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 89937485, now seen corresponding path program 1 times [2022-11-03 02:00:59,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:00:59,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873500993] [2022-11-03 02:00:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:59,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:00:59,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:00:59,417 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:00:59,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 02:01:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:01:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:01,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 81 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:05,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873500993] [2022-11-03 02:01:05,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873500993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130347239] [2022-11-03 02:01:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:05,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:05,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:05,287 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:05,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 02:01:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:01:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:08,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:10,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130347239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:10,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002043185] [2022-11-03 02:01:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:10,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:10,762 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 02:01:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:11,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:01:11,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:01:12,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:01:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002043185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:13,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:13,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 39 [2022-11-03 02:01:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203708490] [2022-11-03 02:01:13,562 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:13,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:01:13,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:13,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:01:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:01:13,564 INFO L87 Difference]: Start difference. First operand 458 states and 563 transitions. Second operand has 39 states, 39 states have (on average 18.53846153846154) internal successors, (723), 39 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:17,017 INFO L93 Difference]: Finished difference Result 907 states and 1163 transitions. [2022-11-03 02:01:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:01:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 18.53846153846154) internal successors, (723), 39 states have internal predecessors, (723), 0 states have call successors, (0), 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 171 [2022-11-03 02:01:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:17,019 INFO L225 Difference]: With dead ends: 907 [2022-11-03 02:01:17,019 INFO L226 Difference]: Without dead ends: 665 [2022-11-03 02:01:17,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 993 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=595, Invalid=4097, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:01:17,020 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 493 mSDsluCounter, 3860 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 4008 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:17,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 4008 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 243 Unchecked, 0.1s Time] [2022-11-03 02:01:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-03 02:01:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 652. [2022-11-03 02:01:17,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 1.261136712749616) internal successors, (821), 651 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 821 transitions. [2022-11-03 02:01:17,081 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 821 transitions. Word has length 171 [2022-11-03 02:01:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:17,081 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 821 transitions. [2022-11-03 02:01:17,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 18.53846153846154) internal successors, (723), 39 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 821 transitions. [2022-11-03 02:01:17,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:01:17,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:17,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:17,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-03 02:01:17,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 02:01:17,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 02:01:17,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:17,698 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:17,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2091632431, now seen corresponding path program 1 times [2022-11-03 02:01:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028948211] [2022-11-03 02:01:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:17,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:17,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:17,701 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:17,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:01:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:01:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 79 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:19,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 79 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:23,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:23,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028948211] [2022-11-03 02:01:23,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028948211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:23,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615565657] [2022-11-03 02:01:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:23,634 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:23,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:23,635 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:23,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 02:01:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:25,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:01:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:27,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:29,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615565657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:29,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428306182] [2022-11-03 02:01:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:29,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:29,142 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:29,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 02:01:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:01:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:01:30,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:01:31,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428306182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:31,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:31,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 39 [2022-11-03 02:01:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129309630] [2022-11-03 02:01:31,962 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:01:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:01:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:01:31,965 INFO L87 Difference]: Start difference. First operand 652 states and 821 transitions. Second operand has 39 states, 39 states have (on average 18.487179487179485) internal successors, (721), 39 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:35,941 INFO L93 Difference]: Finished difference Result 1126 states and 1462 transitions. [2022-11-03 02:01:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:01:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 18.487179487179485) internal successors, (721), 39 states have internal predecessors, (721), 0 states have call successors, (0), 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 171 [2022-11-03 02:01:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:35,943 INFO L225 Difference]: With dead ends: 1126 [2022-11-03 02:01:35,943 INFO L226 Difference]: Without dead ends: 714 [2022-11-03 02:01:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 992 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=637, Invalid=4333, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 02:01:35,944 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 399 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:35,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 3308 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 182 Unchecked, 0.1s Time] [2022-11-03 02:01:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-03 02:01:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 658. [2022-11-03 02:01:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.2587519025875191) internal successors, (827), 657 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 827 transitions. [2022-11-03 02:01:36,010 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 827 transitions. Word has length 171 [2022-11-03 02:01:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:36,010 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 827 transitions. [2022-11-03 02:01:36,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 18.487179487179485) internal successors, (721), 39 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 827 transitions. [2022-11-03 02:01:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:01:36,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:36,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:36,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:36,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:36,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-03 02:01:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:36,637 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:36,637 INFO L85 PathProgramCache]: Analyzing trace with hash -601166763, now seen corresponding path program 1 times [2022-11-03 02:01:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:36,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545225327] [2022-11-03 02:01:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:36,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:36,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:36,640 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:36,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:01:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:01:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:01:38,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:40,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:40,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545225327] [2022-11-03 02:01:40,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545225327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:40,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1912748318] [2022-11-03 02:01:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:40,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:40,728 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 02:01:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:01:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:44,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:46,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1912748318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374598282] [2022-11-03 02:01:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:46,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:46,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:46,037 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:46,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 02:01:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:01:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:50,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374598282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:50,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:01:50,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 11, 12, 11] total 35 [2022-11-03 02:01:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700863256] [2022-11-03 02:01:50,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:50,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:01:50,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:01:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:01:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:01:50,048 INFO L87 Difference]: Start difference. First operand 658 states and 827 transitions. Second operand has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:51,760 INFO L93 Difference]: Finished difference Result 1392 states and 1806 transitions. [2022-11-03 02:01:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:01:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 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 171 [2022-11-03 02:01:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:51,766 INFO L225 Difference]: With dead ends: 1392 [2022-11-03 02:01:51,766 INFO L226 Difference]: Without dead ends: 976 [2022-11-03 02:01:51,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 992 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=336, Invalid=2214, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:01:51,767 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 411 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:51,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 2731 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 163 Unchecked, 0.1s Time] [2022-11-03 02:01:51,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-11-03 02:01:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 920. [2022-11-03 02:01:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 1.2742110990206748) internal successors, (1171), 919 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1171 transitions. [2022-11-03 02:01:51,863 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1171 transitions. Word has length 171 [2022-11-03 02:01:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:51,864 INFO L495 AbstractCegarLoop]: Abstraction has 920 states and 1171 transitions. [2022-11-03 02:01:51,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1171 transitions. [2022-11-03 02:01:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:01:51,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:51,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:51,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 02:01:52,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-03 02:01:52,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-11-03 02:01:52,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:52,474 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:52,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2007620695, now seen corresponding path program 1 times [2022-11-03 02:01:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:01:52,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116707052] [2022-11-03 02:01:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:52,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:01:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:01:52,478 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:01:52,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 02:01:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:01:53,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:54,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 75 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:58,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:01:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116707052] [2022-11-03 02:01:58,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116707052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885777571] [2022-11-03 02:01:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:58,335 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:01:58,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:01:58,336 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:01:58,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 02:01:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:01:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:02,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:03,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885777571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:03,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993523349] [2022-11-03 02:02:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:03,873 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:03,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 02:02:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:04,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:04,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:06,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993523349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:07,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:07,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:02:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639155747] [2022-11-03 02:02:07,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:02:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:02:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:02:07,788 INFO L87 Difference]: Start difference. First operand 920 states and 1171 transitions. Second operand has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:09,601 INFO L93 Difference]: Finished difference Result 1943 states and 2534 transitions. [2022-11-03 02:02:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:02:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 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 171 [2022-11-03 02:02:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:09,604 INFO L225 Difference]: With dead ends: 1943 [2022-11-03 02:02:09,604 INFO L226 Difference]: Without dead ends: 1265 [2022-11-03 02:02:09,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 991 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=354, Invalid=2508, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:02:09,606 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 417 mSDsluCounter, 2945 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 3093 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 3093 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2022-11-03 02:02:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-03 02:02:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1164. [2022-11-03 02:02:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 1.2794496990541702) internal successors, (1488), 1163 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1488 transitions. [2022-11-03 02:02:09,708 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1488 transitions. Word has length 171 [2022-11-03 02:02:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:09,708 INFO L495 AbstractCegarLoop]: Abstraction has 1164 states and 1488 transitions. [2022-11-03 02:02:09,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1488 transitions. [2022-11-03 02:02:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:02:09,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:09,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:09,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-03 02:02:09,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:10,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:10,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:10,326 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1590224089, now seen corresponding path program 1 times [2022-11-03 02:02:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:10,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877829540] [2022-11-03 02:02:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:10,329 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:10,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 02:02:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 73 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:12,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 73 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:16,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877829540] [2022-11-03 02:02:16,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877829540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:16,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [984432669] [2022-11-03 02:02:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:16,227 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:16,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 02:02:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:17,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:21,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [984432669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232481288] [2022-11-03 02:02:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:21,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:21,831 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:21,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 02:02:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:24,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:25,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232481288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:25,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:25,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:02:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765873992] [2022-11-03 02:02:25,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:25,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:02:25,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:02:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:02:25,868 INFO L87 Difference]: Start difference. First operand 1164 states and 1488 transitions. Second operand has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:27,663 INFO L93 Difference]: Finished difference Result 2168 states and 2824 transitions. [2022-11-03 02:02:27,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:02:27,664 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 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 171 [2022-11-03 02:02:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:27,667 INFO L225 Difference]: With dead ends: 2168 [2022-11-03 02:02:27,667 INFO L226 Difference]: Without dead ends: 1252 [2022-11-03 02:02:27,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 991 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=336, Invalid=2316, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:02:27,670 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 394 mSDsluCounter, 2889 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:27,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 3032 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 94 Unchecked, 0.0s Time] [2022-11-03 02:02:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-03 02:02:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1168. [2022-11-03 02:02:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 1.2793487574978577) internal successors, (1493), 1167 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1493 transitions. [2022-11-03 02:02:27,775 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1493 transitions. Word has length 171 [2022-11-03 02:02:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:27,775 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1493 transitions. [2022-11-03 02:02:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 15.666666666666666) internal successors, (564), 36 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1493 transitions. [2022-11-03 02:02:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:02:27,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:27,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:27,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:28,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:28,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-03 02:02:28,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:28,394 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:28,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash -743168549, now seen corresponding path program 1 times [2022-11-03 02:02:28,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:28,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741679828] [2022-11-03 02:02:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:28,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:28,398 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:28,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:02:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:02:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:02:30,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741679828] [2022-11-03 02:02:32,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741679828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1802166674] [2022-11-03 02:02:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:32,300 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:32,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:32,302 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:32,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 02:02:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:33,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:33,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:35,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:37,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1802166674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:37,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257441950] [2022-11-03 02:02:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:37,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:37,608 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 02:02:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:38,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:40,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:41,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257441950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:41,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:41,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 11, 12, 11] total 35 [2022-11-03 02:02:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400972046] [2022-11-03 02:02:41,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:41,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:02:41,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:02:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:02:41,424 INFO L87 Difference]: Start difference. First operand 1168 states and 1493 transitions. Second operand has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:43,287 INFO L93 Difference]: Finished difference Result 3274 states and 4241 transitions. [2022-11-03 02:02:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:02:43,288 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 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 171 [2022-11-03 02:02:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:43,296 INFO L225 Difference]: With dead ends: 3274 [2022-11-03 02:02:43,296 INFO L226 Difference]: Without dead ends: 2356 [2022-11-03 02:02:43,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 991 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:02:43,299 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 493 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 3108 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:43,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 3108 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-11-03 02:02:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2022-11-03 02:02:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2250. [2022-11-03 02:02:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.277901289461983) internal successors, (2874), 2249 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2874 transitions. [2022-11-03 02:02:43,513 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2874 transitions. Word has length 171 [2022-11-03 02:02:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:43,513 INFO L495 AbstractCegarLoop]: Abstraction has 2250 states and 2874 transitions. [2022-11-03 02:02:43,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 15.771428571428572) internal successors, (552), 35 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2874 transitions. [2022-11-03 02:02:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:02:43,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:43,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:43,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:43,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-03 02:02:43,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:44,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:44,116 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:44,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -182468771, now seen corresponding path program 1 times [2022-11-03 02:02:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:44,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100696541] [2022-11-03 02:02:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:44,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:44,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:44,120 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:44,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:02:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 69 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:46,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 69 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:49,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:49,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100696541] [2022-11-03 02:02:49,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100696541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:49,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605361096] [2022-11-03 02:02:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:49,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:49,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:49,297 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:49,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:02:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:02:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:53,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605361096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591028399] [2022-11-03 02:02:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:54,918 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:54,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-03 02:02:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:02:55,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:58,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591028399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:58,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:58,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 12, 11] total 38 [2022-11-03 02:02:58,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850719075] [2022-11-03 02:02:58,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:02:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:02:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:02:58,875 INFO L87 Difference]: Start difference. First operand 2250 states and 2874 transitions. Second operand has 38 states, 38 states have (on average 14.842105263157896) internal successors, (564), 38 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:01,526 INFO L93 Difference]: Finished difference Result 4726 states and 6118 transitions. [2022-11-03 02:03:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:03:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 14.842105263157896) internal successors, (564), 38 states have internal predecessors, (564), 0 states have call successors, (0), 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 171 [2022-11-03 02:03:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:01,533 INFO L225 Difference]: With dead ends: 4726 [2022-11-03 02:03:01,533 INFO L226 Difference]: Without dead ends: 2784 [2022-11-03 02:03:01,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 988 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=336, Invalid=2634, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:03:01,537 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 457 mSDsluCounter, 2963 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:01,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 3111 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-11-03 02:03:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2022-11-03 02:03:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2572. [2022-11-03 02:03:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 1.2777129521586932) internal successors, (3285), 2571 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 3285 transitions. [2022-11-03 02:03:01,793 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 3285 transitions. Word has length 171 [2022-11-03 02:03:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:01,793 INFO L495 AbstractCegarLoop]: Abstraction has 2572 states and 3285 transitions. [2022-11-03 02:03:01,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 14.842105263157896) internal successors, (564), 38 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 3285 transitions. [2022-11-03 02:03:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:03:01,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:01,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:01,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-03 02:03:02,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-03 02:03:02,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:03:02,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:02,399 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1078448479, now seen corresponding path program 1 times [2022-11-03 02:03:02,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:02,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261451432] [2022-11-03 02:03:02,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:02,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:02,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:02,402 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:02,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 02:03:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:03:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 65 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 65 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:07,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:07,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261451432] [2022-11-03 02:03:07,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261451432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:07,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [690385414] [2022-11-03 02:03:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:07,816 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:07,817 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:07,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 02:03:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:09,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:11,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:13,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [690385414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104732739] [2022-11-03 02:03:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:13,257 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:13,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-03 02:03:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:13,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:03:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:16,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:17,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104732739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:17,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:17,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 12, 11] total 34 [2022-11-03 02:03:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938012720] [2022-11-03 02:03:17,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:03:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:17,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:03:17,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:03:17,184 INFO L87 Difference]: Start difference. First operand 2572 states and 3285 transitions. Second operand has 34 states, 34 states have (on average 16.58823529411765) internal successors, (564), 34 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:19,048 INFO L93 Difference]: Finished difference Result 5326 states and 6892 transitions. [2022-11-03 02:03:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:03:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 16.58823529411765) internal successors, (564), 34 states have internal predecessors, (564), 0 states have call successors, (0), 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 171 [2022-11-03 02:03:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:19,055 INFO L225 Difference]: With dead ends: 5326 [2022-11-03 02:03:19,055 INFO L226 Difference]: Without dead ends: 3134 [2022-11-03 02:03:19,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 992 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=321, Invalid=2229, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:03:19,058 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 381 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:19,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 3297 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-11-03 02:03:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2022-11-03 02:03:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2894. [2022-11-03 02:03:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 1.2782578638091946) internal successors, (3698), 2893 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3698 transitions. [2022-11-03 02:03:19,354 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3698 transitions. Word has length 171 [2022-11-03 02:03:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:19,355 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 3698 transitions. [2022-11-03 02:03:19,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 16.58823529411765) internal successors, (564), 34 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3698 transitions. [2022-11-03 02:03:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:03:19,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:19,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:19,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:19,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:19,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:19,974 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1522349153, now seen corresponding path program 1 times [2022-11-03 02:03:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999828422] [2022-11-03 02:03:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:19,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:19,977 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:19,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 02:03:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:03:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 63 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 63 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:31,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:31,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999828422] [2022-11-03 02:03:31,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999828422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1530589127] [2022-11-03 02:03:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,658 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:31,659 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:31,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 02:03:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:36,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:38,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1530589127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:38,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48680396] [2022-11-03 02:03:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:38,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:38,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:38,950 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:38,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 02:03:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:03:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:43,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48680396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:43,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:43,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 11, 11, 12, 11] total 75 [2022-11-03 02:03:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869003100] [2022-11-03 02:03:43,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-03 02:03:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-03 02:03:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5279, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:03:43,135 INFO L87 Difference]: Start difference. First operand 2894 states and 3698 transitions. Second operand has 75 states, 75 states have (on average 7.866666666666666) internal successors, (590), 75 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:55,731 INFO L93 Difference]: Finished difference Result 5667 states and 7318 transitions. [2022-11-03 02:03:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-03 02:03:55,732 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 7.866666666666666) internal successors, (590), 75 states have internal predecessors, (590), 0 states have call successors, (0), 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 171 [2022-11-03 02:03:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:55,736 INFO L225 Difference]: With dead ends: 5667 [2022-11-03 02:03:55,736 INFO L226 Difference]: Without dead ends: 3241 [2022-11-03 02:03:55,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 958 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1083, Invalid=17277, Unknown=0, NotChecked=0, Total=18360 [2022-11-03 02:03:55,739 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 607 mSDsluCounter, 7745 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 7912 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 7912 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 1118 Unchecked, 0.1s Time] [2022-11-03 02:03:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2022-11-03 02:03:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 3004. [2022-11-03 02:03:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 1.2760572760572761) internal successors, (3832), 3003 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3832 transitions. [2022-11-03 02:03:56,004 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3832 transitions. Word has length 171 [2022-11-03 02:03:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:56,004 INFO L495 AbstractCegarLoop]: Abstraction has 3004 states and 3832 transitions. [2022-11-03 02:03:56,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 7.866666666666666) internal successors, (590), 75 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3832 transitions. [2022-11-03 02:03:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:03:56,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:56,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:56,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-03 02:03:56,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-03 02:03:56,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:56,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:56,607 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash -506236957, now seen corresponding path program 1 times [2022-11-03 02:03:56,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:56,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051168370] [2022-11-03 02:03:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:56,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:56,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:56,610 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:56,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:03:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:03:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:59,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:00,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051168370] [2022-11-03 02:04:00,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051168370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2045039429] [2022-11-03 02:04:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:00,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:00,547 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:00,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 02:04:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:04:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:03,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:04,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2045039429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:04,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859713125] [2022-11-03 02:04:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:04,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:04,454 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:04,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 02:04:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:04:05,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:06,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:07,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859713125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:07,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:07,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 11] total 24 [2022-11-03 02:04:07,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444128404] [2022-11-03 02:04:07,929 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:04:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:07,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:04:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:04:07,931 INFO L87 Difference]: Start difference. First operand 3004 states and 3832 transitions. Second operand has 24 states, 24 states have (on average 14.416666666666666) internal successors, (346), 24 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:08,692 INFO L93 Difference]: Finished difference Result 6960 states and 8999 transitions. [2022-11-03 02:04:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:04:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.416666666666666) internal successors, (346), 24 states have internal predecessors, (346), 0 states have call successors, (0), 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 171 [2022-11-03 02:04:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:08,698 INFO L225 Difference]: With dead ends: 6960 [2022-11-03 02:04:08,698 INFO L226 Difference]: Without dead ends: 4534 [2022-11-03 02:04:08,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 995 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:04:08,700 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 335 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:08,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 2130 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 170 Unchecked, 0.3s Time] [2022-11-03 02:04:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2022-11-03 02:04:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 2972. [2022-11-03 02:04:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 1.274654998317065) internal successors, (3787), 2971 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 3787 transitions. [2022-11-03 02:04:09,015 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 3787 transitions. Word has length 171 [2022-11-03 02:04:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:09,015 INFO L495 AbstractCegarLoop]: Abstraction has 2972 states and 3787 transitions. [2022-11-03 02:04:09,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.416666666666666) internal successors, (346), 24 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 3787 transitions. [2022-11-03 02:04:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:04:09,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:09,018 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:09,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 02:04:09,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-03 02:04:09,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 02:04:09,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:09,619 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:09,619 INFO L85 PathProgramCache]: Analyzing trace with hash 387249381, now seen corresponding path program 1 times [2022-11-03 02:04:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:09,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090948231] [2022-11-03 02:04:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:09,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:09,622 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:09,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 02:04:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:04:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:11,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:13,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090948231] [2022-11-03 02:04:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090948231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269154432] [2022-11-03 02:04:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:13,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:13,878 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:13,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-03 02:04:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:04:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:15,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:15,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269154432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:15,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980160479] [2022-11-03 02:04:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:15,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:15,507 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:15,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-03 02:04:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:16,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:04:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:16,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:16,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980160479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:16,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:16,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 8, 8] total 26 [2022-11-03 02:04:16,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134942901] [2022-11-03 02:04:16,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:16,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:04:16,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:16,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:04:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:04:16,607 INFO L87 Difference]: Start difference. First operand 2972 states and 3787 transitions. Second operand has 26 states, 26 states have (on average 19.692307692307693) internal successors, (512), 26 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:22,762 INFO L93 Difference]: Finished difference Result 17180 states and 22360 transitions. [2022-11-03 02:04:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:04:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 19.692307692307693) internal successors, (512), 26 states have internal predecessors, (512), 0 states have call successors, (0), 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 171 [2022-11-03 02:04:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:22,787 INFO L225 Difference]: With dead ends: 17180 [2022-11-03 02:04:22,787 INFO L226 Difference]: Without dead ends: 14842 [2022-11-03 02:04:22,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1309, Invalid=5663, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:04:22,792 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5628 mSDsluCounter, 3273 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5628 SdHoareTripleChecker+Valid, 3484 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:22,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5628 Valid, 3484 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 697 Invalid, 0 Unknown, 273 Unchecked, 2.3s Time] [2022-11-03 02:04:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14842 states. [2022-11-03 02:04:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14842 to 4110. [2022-11-03 02:04:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 4109 states have (on average 1.2774397663665125) internal successors, (5249), 4109 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5249 transitions. [2022-11-03 02:04:23,431 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5249 transitions. Word has length 171 [2022-11-03 02:04:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:23,431 INFO L495 AbstractCegarLoop]: Abstraction has 4110 states and 5249 transitions. [2022-11-03 02:04:23,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.692307692307693) internal successors, (512), 26 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5249 transitions. [2022-11-03 02:04:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:04:23,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:23,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:23,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:23,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-11-03 02:04:23,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 02:04:24,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:24,051 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1467873371, now seen corresponding path program 1 times [2022-11-03 02:04:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:24,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284385777] [2022-11-03 02:04:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:24,054 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:24,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 02:04:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:04:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:26,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:27,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284385777] [2022-11-03 02:04:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284385777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905020388] [2022-11-03 02:04:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:27,770 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:27,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 02:04:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:04:28,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:28,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1905020388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:28,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:28,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10] total 22 [2022-11-03 02:04:28,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956304428] [2022-11-03 02:04:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:04:28,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:04:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:04:28,782 INFO L87 Difference]: Start difference. First operand 4110 states and 5249 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:29,927 INFO L93 Difference]: Finished difference Result 10536 states and 13687 transitions. [2022-11-03 02:04:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:04:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-03 02:04:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:29,942 INFO L225 Difference]: With dead ends: 10536 [2022-11-03 02:04:29,942 INFO L226 Difference]: Without dead ends: 8254 [2022-11-03 02:04:29,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:04:29,946 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 951 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:29,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 849 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8254 states. [2022-11-03 02:04:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8254 to 4194. [2022-11-03 02:04:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4194 states, 4193 states have (on average 1.2718817076079179) internal successors, (5333), 4193 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5333 transitions. [2022-11-03 02:04:30,675 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5333 transitions. Word has length 171 [2022-11-03 02:04:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:30,675 INFO L495 AbstractCegarLoop]: Abstraction has 4194 states and 5333 transitions. [2022-11-03 02:04:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5333 transitions. [2022-11-03 02:04:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:04:30,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:30,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:30,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:30,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:31,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:31,079 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1365761177, now seen corresponding path program 1 times [2022-11-03 02:04:31,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88245936] [2022-11-03 02:04:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:31,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:31,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:31,081 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:31,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-03 02:04:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:04:31,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 59 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:32,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88245936] [2022-11-03 02:04:32,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88245936] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:32,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:32,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-11-03 02:04:32,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500359954] [2022-11-03 02:04:32,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:04:32,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:32,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:04:32,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:32,783 INFO L87 Difference]: Start difference. First operand 4194 states and 5333 transitions. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:33,742 INFO L93 Difference]: Finished difference Result 12278 states and 15782 transitions. [2022-11-03 02:04:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:04:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2022-11-03 02:04:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:33,750 INFO L225 Difference]: With dead ends: 12278 [2022-11-03 02:04:33,751 INFO L226 Difference]: Without dead ends: 8670 [2022-11-03 02:04:33,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:04:33,755 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 529 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:33,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 443 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2022-11-03 02:04:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 4206. [2022-11-03 02:04:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 1.270154577883472) internal successors, (5341), 4205 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 5341 transitions. [2022-11-03 02:04:34,447 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 5341 transitions. Word has length 171 [2022-11-03 02:04:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:34,447 INFO L495 AbstractCegarLoop]: Abstraction has 4206 states and 5341 transitions. [2022-11-03 02:04:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 5341 transitions. [2022-11-03 02:04:34,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:04:34,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:34,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:34,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (96)] Ended with exit code 0 [2022-11-03 02:04:34,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:34,652 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:34,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1718849559, now seen corresponding path program 1 times [2022-11-03 02:04:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:34,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296069124] [2022-11-03 02:04:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:34,655 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:34,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:04:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:04:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:36,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:38,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296069124] [2022-11-03 02:04:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296069124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [960677381] [2022-11-03 02:04:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:38,434 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:38,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:38,435 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:38,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 02:04:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:39,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:04:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:40,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:42,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [960677381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:42,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020568315] [2022-11-03 02:04:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:42,308 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:42,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-03 02:04:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:04:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:04:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:04:45,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020568315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:45,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:45,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:04:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624845087] [2022-11-03 02:04:45,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:04:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:04:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:04:45,127 INFO L87 Difference]: Start difference. First operand 4206 states and 5341 transitions. Second operand has 26 states, 26 states have (on average 20.26923076923077) internal successors, (527), 26 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 02:04:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:46,732 INFO L93 Difference]: Finished difference Result 12588 states and 16113 transitions. [2022-11-03 02:04:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:04:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 20.26923076923077) internal successors, (527), 26 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) Word has length 171 [2022-11-03 02:04:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:46,741 INFO L225 Difference]: With dead ends: 12588 [2022-11-03 02:04:46,741 INFO L226 Difference]: Without dead ends: 8404 [2022-11-03 02:04:46,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 994 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:04:46,747 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 712 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:46,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1370 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-11-03 02:04:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2022-11-03 02:04:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 7656. [2022-11-03 02:04:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 1.2633572828216852) internal successors, (9671), 7655 states have internal predecessors, (9671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 9671 transitions. [2022-11-03 02:04:47,802 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 9671 transitions. Word has length 171 [2022-11-03 02:04:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:47,803 INFO L495 AbstractCegarLoop]: Abstraction has 7656 states and 9671 transitions. [2022-11-03 02:04:47,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 20.26923076923077) internal successors, (527), 26 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 02:04:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 9671 transitions. [2022-11-03 02:04:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:04:47,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:47,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:47,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:04:48,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:48,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-03 02:04:48,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:48,408 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1791236117, now seen corresponding path program 1 times [2022-11-03 02:04:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:48,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722203376] [2022-11-03 02:04:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:48,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:48,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:48,411 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:48,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:04:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:04:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:50,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:52,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:52,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722203376] [2022-11-03 02:04:52,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722203376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:52,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231668050] [2022-11-03 02:04:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:52,289 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:52,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:52,292 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:52,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 02:04:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:53,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:04:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:54,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:04:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231668050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610410707] [2022-11-03 02:04:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:56,409 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:56,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-03 02:04:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:04:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:04:57,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 02:04:58,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610410707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:58,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:58,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 28 [2022-11-03 02:04:58,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962287591] [2022-11-03 02:04:58,430 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:58,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:04:58,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:04:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:04:58,432 INFO L87 Difference]: Start difference. First operand 7656 states and 9671 transitions. Second operand has 28 states, 28 states have (on average 24.75) internal successors, (693), 28 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:00,705 INFO L93 Difference]: Finished difference Result 16884 states and 21506 transitions. [2022-11-03 02:05:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:05:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 24.75) internal successors, (693), 28 states have internal predecessors, (693), 0 states have call successors, (0), 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 171 [2022-11-03 02:05:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:00,711 INFO L225 Difference]: With dead ends: 16884 [2022-11-03 02:05:00,711 INFO L226 Difference]: Without dead ends: 9272 [2022-11-03 02:05:00,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1001 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=502, Invalid=2150, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:05:00,715 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1299 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 1246 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-11-03 02:05:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9272 states. [2022-11-03 02:05:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9272 to 7636. [2022-11-03 02:05:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7636 states, 7635 states have (on average 1.2552717747216764) internal successors, (9584), 7635 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7636 states to 7636 states and 9584 transitions. [2022-11-03 02:05:01,759 INFO L78 Accepts]: Start accepts. Automaton has 7636 states and 9584 transitions. Word has length 171 [2022-11-03 02:05:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:01,759 INFO L495 AbstractCegarLoop]: Abstraction has 7636 states and 9584 transitions. [2022-11-03 02:05:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.75) internal successors, (693), 28 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7636 states and 9584 transitions. [2022-11-03 02:05:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:05:01,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:01,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:01,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 02:05:02,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:02,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-03 02:05:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:02,372 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1089636243, now seen corresponding path program 1 times [2022-11-03 02:05:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141052878] [2022-11-03 02:05:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:02,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:02,375 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-03 02:05:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:05:03,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:04,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:06,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141052878] [2022-11-03 02:05:06,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141052878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:06,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864347966] [2022-11-03 02:05:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:06,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:06,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:06,330 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-03 02:05:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:05:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:05:09,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:05:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864347966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:10,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581308421] [2022-11-03 02:05:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:10,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:10,288 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:10,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-03 02:05:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:05:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:05:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:05:13,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581308421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:13,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:05:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569523190] [2022-11-03 02:05:13,171 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:13,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:05:13,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:13,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:05:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:05:13,173 INFO L87 Difference]: Start difference. First operand 7636 states and 9584 transitions. Second operand has 26 states, 26 states have (on average 20.73076923076923) internal successors, (539), 26 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:14,996 INFO L93 Difference]: Finished difference Result 10538 states and 13300 transitions. [2022-11-03 02:05:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:05:14,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 20.73076923076923) internal successors, (539), 26 states have internal predecessors, (539), 0 states have call successors, (0), 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 171 [2022-11-03 02:05:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:15,001 INFO L225 Difference]: With dead ends: 10538 [2022-11-03 02:05:15,002 INFO L226 Difference]: Without dead ends: 6350 [2022-11-03 02:05:15,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1001 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:05:15,005 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 490 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:15,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1601 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-11-03 02:05:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2022-11-03 02:05:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 5342. [2022-11-03 02:05:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5342 states, 5341 states have (on average 1.2374087249578731) internal successors, (6609), 5341 states have internal predecessors, (6609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5342 states to 5342 states and 6609 transitions. [2022-11-03 02:05:15,536 INFO L78 Accepts]: Start accepts. Automaton has 5342 states and 6609 transitions. Word has length 171 [2022-11-03 02:05:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:15,537 INFO L495 AbstractCegarLoop]: Abstraction has 5342 states and 6609 transitions. [2022-11-03 02:05:15,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 20.73076923076923) internal successors, (539), 26 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5342 states and 6609 transitions. [2022-11-03 02:05:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:05:15,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:15,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:15,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-03 02:05:15,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (104)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:15,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:16,141 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2075172111, now seen corresponding path program 1 times [2022-11-03 02:05:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355998863] [2022-11-03 02:05:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:16,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:16,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:16,144 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:16,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-03 02:05:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:05:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:18,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:19,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355998863] [2022-11-03 02:05:19,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355998863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [145596770] [2022-11-03 02:05:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:19,899 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:19,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-03 02:05:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:05:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:05:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:05:23,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [145596770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341582486] [2022-11-03 02:05:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:23,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:23,797 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:23,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-03 02:05:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:24,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:05:24,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:05:25,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:05:26,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341582486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:26,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:26,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:05:26,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743072335] [2022-11-03 02:05:26,460 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:26,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:05:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:05:26,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:05:26,461 INFO L87 Difference]: Start difference. First operand 5342 states and 6609 transitions. Second operand has 26 states, 26 states have (on average 21.192307692307693) internal successors, (551), 26 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:28,771 INFO L93 Difference]: Finished difference Result 14720 states and 18530 transitions. [2022-11-03 02:05:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:05:28,772 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 21.192307692307693) internal successors, (551), 26 states have internal predecessors, (551), 0 states have call successors, (0), 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 171 [2022-11-03 02:05:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:28,779 INFO L225 Difference]: With dead ends: 14720 [2022-11-03 02:05:28,779 INFO L226 Difference]: Without dead ends: 10382 [2022-11-03 02:05:28,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 996 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:05:28,783 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1394 mSDsluCounter, 3594 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:28,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1394 Valid, 3957 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 335 Unchecked, 0.8s Time] [2022-11-03 02:05:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10382 states. [2022-11-03 02:05:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10382 to 6870. [2022-11-03 02:05:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 1.2355510263502694) internal successors, (8487), 6869 states have internal predecessors, (8487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 8487 transitions. [2022-11-03 02:05:29,433 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 8487 transitions. Word has length 171 [2022-11-03 02:05:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:29,433 INFO L495 AbstractCegarLoop]: Abstraction has 6870 states and 8487 transitions. [2022-11-03 02:05:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.192307692307693) internal successors, (551), 26 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:29,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 8487 transitions. [2022-11-03 02:05:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:05:29,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:29,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:29,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-11-03 02:05:29,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:29,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-03 02:05:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:30,041 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1934623501, now seen corresponding path program 1 times [2022-11-03 02:05:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:30,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989124534] [2022-11-03 02:05:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:30,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:30,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:30,043 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:30,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-03 02:05:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:05:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:05:34,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:05:41,821 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989124534] [2022-11-03 02:05:41,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989124534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466130640] [2022-11-03 02:05:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:41,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:41,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:41,822 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:41,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-03 02:05:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:05:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:05:50,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:05:57,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1466130640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049747122] [2022-11-03 02:05:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:57,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:57,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:57,346 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:57,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-03 02:05:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:05:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:06:00,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:06:02,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049747122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:02,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:02,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 85 [2022-11-03 02:06:02,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752366342] [2022-11-03 02:06:02,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-03 02:06:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-03 02:06:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6708, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 02:06:02,470 INFO L87 Difference]: Start difference. First operand 6870 states and 8487 transitions. Second operand has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:57,182 INFO L93 Difference]: Finished difference Result 47584 states and 59772 transitions. [2022-11-03 02:06:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-03 02:06:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-03 02:06:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:57,213 INFO L225 Difference]: With dead ends: 47584 [2022-11-03 02:06:57,213 INFO L226 Difference]: Without dead ends: 47582 [2022-11-03 02:06:57,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1171 GetRequests, 937 SyntacticMatches, 3 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14068 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=8440, Invalid=45616, Unknown=0, NotChecked=0, Total=54056 [2022-11-03 02:06:57,220 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 3322 mSDsluCounter, 17611 mSDsCounter, 0 mSdLazyCounter, 4464 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3322 SdHoareTripleChecker+Valid, 18099 SdHoareTripleChecker+Invalid, 13514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8952 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:57,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3322 Valid, 18099 Invalid, 13514 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 4464 Invalid, 0 Unknown, 8952 Unchecked, 10.7s Time] [2022-11-03 02:06:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47582 states. [2022-11-03 02:06:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47582 to 7715. [2022-11-03 02:06:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7715 states, 7714 states have (on average 1.241768213637542) internal successors, (9579), 7714 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7715 states to 7715 states and 9579 transitions. [2022-11-03 02:06:58,102 INFO L78 Accepts]: Start accepts. Automaton has 7715 states and 9579 transitions. Word has length 171 [2022-11-03 02:06:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:58,102 INFO L495 AbstractCegarLoop]: Abstraction has 7715 states and 9579 transitions. [2022-11-03 02:06:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7715 states and 9579 transitions. [2022-11-03 02:06:58,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:06:58,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:58,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:58,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-03 02:06:58,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-03 02:06:58,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-03 02:06:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:58,706 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1676458063, now seen corresponding path program 1 times [2022-11-03 02:06:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877032407] [2022-11-03 02:06:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:58,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:58,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:58,710 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:58,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 02:06:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:59,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:06:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:59,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:07:00,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877032407] [2022-11-03 02:07:00,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877032407] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:00,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:00,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-03 02:07:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720351420] [2022-11-03 02:07:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:07:00,107 INFO L87 Difference]: Start difference. First operand 7715 states and 9579 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:01,382 INFO L93 Difference]: Finished difference Result 18732 states and 23509 transitions. [2022-11-03 02:07:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:07:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 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 171 [2022-11-03 02:07:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:01,390 INFO L225 Difference]: With dead ends: 18732 [2022-11-03 02:07:01,390 INFO L226 Difference]: Without dead ends: 12821 [2022-11-03 02:07:01,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:07:01,393 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 391 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:01,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1115 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2022-11-03 02:07:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 7603. [2022-11-03 02:07:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 7602 states have (on average 1.2249408050513022) internal successors, (9312), 7602 states have internal predecessors, (9312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 9312 transitions. [2022-11-03 02:07:02,115 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 9312 transitions. Word has length 171 [2022-11-03 02:07:02,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:02,115 INFO L495 AbstractCegarLoop]: Abstraction has 7603 states and 9312 transitions. [2022-11-03 02:07:02,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 9312 transitions. [2022-11-03 02:07:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:07:02,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:02,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:02,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 02:07:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:07:02,318 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:02,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1349226545, now seen corresponding path program 1 times [2022-11-03 02:07:02,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:02,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25200267] [2022-11-03 02:07:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:02,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:02,320 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:02,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 02:07:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:07:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 24 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:03,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:04,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25200267] [2022-11-03 02:07:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25200267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1173628481] [2022-11-03 02:07:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:04,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:04,062 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:04,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 02:07:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:07:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:04,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:05,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1173628481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:05,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601578918] [2022-11-03 02:07:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:05,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:05,191 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:05,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-03 02:07:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:07:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:05,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:06,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601578918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:06,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:06,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 8, 8, 8] total 19 [2022-11-03 02:07:06,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028266304] [2022-11-03 02:07:06,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:06,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:07:06,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:06,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:07:06,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:07:06,083 INFO L87 Difference]: Start difference. First operand 7603 states and 9312 transitions. Second operand has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:07,265 INFO L93 Difference]: Finished difference Result 17465 states and 21718 transitions. [2022-11-03 02:07:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:07:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-03 02:07:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:07,271 INFO L225 Difference]: With dead ends: 17465 [2022-11-03 02:07:07,272 INFO L226 Difference]: Without dead ends: 11746 [2022-11-03 02:07:07,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 1004 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:07:07,275 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 273 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:07,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1756 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-03 02:07:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11746 states. [2022-11-03 02:07:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11746 to 11412. [2022-11-03 02:07:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11412 states, 11411 states have (on average 1.2342476557707476) internal successors, (14084), 11411 states have internal predecessors, (14084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11412 states to 11412 states and 14084 transitions. [2022-11-03 02:07:08,172 INFO L78 Accepts]: Start accepts. Automaton has 11412 states and 14084 transitions. Word has length 171 [2022-11-03 02:07:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:08,172 INFO L495 AbstractCegarLoop]: Abstraction has 11412 states and 14084 transitions. [2022-11-03 02:07:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.842105263157894) internal successors, (377), 19 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 11412 states and 14084 transitions. [2022-11-03 02:07:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:07:08,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:08,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:08,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 02:07:08,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-11-03 02:07:08,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2022-11-03 02:07:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:08,776 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 861703537, now seen corresponding path program 1 times [2022-11-03 02:07:08,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:08,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856331995] [2022-11-03 02:07:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:08,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:08,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:08,779 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 02:07:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:07:09,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:10,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:11,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856331995] [2022-11-03 02:07:11,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856331995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:11,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545884230] [2022-11-03 02:07:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:11,730 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:11,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-03 02:07:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:07:13,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:07:15,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545884230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764424294] [2022-11-03 02:07:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:15,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:15,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:15,153 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:15,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-03 02:07:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:15,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:07:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:07:16,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:07:17,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764424294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:17,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:17,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:07:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948887866] [2022-11-03 02:07:17,659 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:07:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:07:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:07:17,660 INFO L87 Difference]: Start difference. First operand 11412 states and 14084 transitions. Second operand has 26 states, 26 states have (on average 21.96153846153846) internal successors, (571), 26 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:21,342 INFO L93 Difference]: Finished difference Result 45152 states and 56411 transitions. [2022-11-03 02:07:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:07:21,343 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 21.96153846153846) internal successors, (571), 26 states have internal predecessors, (571), 0 states have call successors, (0), 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 171 [2022-11-03 02:07:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:21,368 INFO L225 Difference]: With dead ends: 45152 [2022-11-03 02:07:21,368 INFO L226 Difference]: Without dead ends: 41844 [2022-11-03 02:07:21,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 995 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=1759, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:07:21,373 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 1255 mSDsluCounter, 3050 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:21,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 3419 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 586 Unchecked, 0.8s Time] [2022-11-03 02:07:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41844 states. [2022-11-03 02:07:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41844 to 14772. [2022-11-03 02:07:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14772 states, 14771 states have (on average 1.2301807595965066) internal successors, (18171), 14771 states have internal predecessors, (18171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14772 states to 14772 states and 18171 transitions. [2022-11-03 02:07:22,663 INFO L78 Accepts]: Start accepts. Automaton has 14772 states and 18171 transitions. Word has length 171 [2022-11-03 02:07:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:22,663 INFO L495 AbstractCegarLoop]: Abstraction has 14772 states and 18171 transitions. [2022-11-03 02:07:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.96153846153846) internal successors, (571), 26 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 14772 states and 18171 transitions. [2022-11-03 02:07:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:07:22,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:22,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:22,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:22,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (117)] Ended with exit code 0 [2022-11-03 02:07:23,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:23,267 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -827240205, now seen corresponding path program 1 times [2022-11-03 02:07:23,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546069443] [2022-11-03 02:07:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:23,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:23,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:23,270 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:23,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-03 02:07:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:07:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:25,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:26,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546069443] [2022-11-03 02:07:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546069443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [208796378] [2022-11-03 02:07:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:26,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:26,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:26,310 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:26,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Waiting until timeout for monitored process [2022-11-03 02:07:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:07:27,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:07:28,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:07:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [208796378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201756071] [2022-11-03 02:07:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:29,800 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:29,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-03 02:07:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:07:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:07:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:07:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201756071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:32,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:32,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 9, 6, 6] total 28 [2022-11-03 02:07:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299869370] [2022-11-03 02:07:32,519 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:07:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:07:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:07:32,520 INFO L87 Difference]: Start difference. First operand 14772 states and 18171 transitions. Second operand has 28 states, 28 states have (on average 20.607142857142858) internal successors, (577), 28 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:36,014 INFO L93 Difference]: Finished difference Result 41044 states and 50760 transitions. [2022-11-03 02:07:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:07:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 20.607142857142858) internal successors, (577), 28 states have internal predecessors, (577), 0 states have call successors, (0), 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 171 [2022-11-03 02:07:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:36,033 INFO L225 Difference]: With dead ends: 41044 [2022-11-03 02:07:36,033 INFO L226 Difference]: Without dead ends: 34434 [2022-11-03 02:07:36,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 994 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=518, Invalid=2032, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:07:36,038 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1540 mSDsluCounter, 2060 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:36,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 2223 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 387 Invalid, 0 Unknown, 563 Unchecked, 0.8s Time] [2022-11-03 02:07:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34434 states. [2022-11-03 02:07:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34434 to 14952. [2022-11-03 02:07:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14952 states, 14951 states have (on average 1.2235970838071033) internal successors, (18294), 14951 states have internal predecessors, (18294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 18294 transitions. [2022-11-03 02:07:37,264 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 18294 transitions. Word has length 171 [2022-11-03 02:07:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:37,265 INFO L495 AbstractCegarLoop]: Abstraction has 14952 states and 18294 transitions. [2022-11-03 02:07:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.607142857142858) internal successors, (577), 28 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:07:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 18294 transitions. [2022-11-03 02:07:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:07:37,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:37,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:37,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:37,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:37,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (120)] Ended with exit code 0 [2022-11-03 02:07:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:37,870 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1879379189, now seen corresponding path program 1 times [2022-11-03 02:07:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:07:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064157174] [2022-11-03 02:07:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:37,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:07:37,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:07:37,873 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:07:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-03 02:07:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 02:07:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:07:41,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:07:50,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064157174] [2022-11-03 02:07:50,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064157174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:50,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678366661] [2022-11-03 02:07:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:50,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:50,254 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:50,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-03 02:07:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:07:51,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:07:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:08:07,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678366661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:07,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460482287] [2022-11-03 02:08:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:07,496 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:07,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-03 02:08:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:08:08,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:08:10,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:08:12,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460482287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:08:12,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:08:12,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 93 [2022-11-03 02:08:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730309360] [2022-11-03 02:08:12,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:12,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-03 02:08:12,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:08:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-03 02:08:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=8080, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:08:12,002 INFO L87 Difference]: Start difference. First operand 14952 states and 18294 transitions. Second operand has 93 states, 93 states have (on average 4.634408602150538) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:52,740 INFO L93 Difference]: Finished difference Result 43496 states and 53600 transitions. [2022-11-03 02:08:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-03 02:08:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.634408602150538) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-03 02:08:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:52,775 INFO L225 Difference]: With dead ends: 43496 [2022-11-03 02:08:52,775 INFO L226 Difference]: Without dead ends: 43494 [2022-11-03 02:08:52,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 928 SyntacticMatches, 5 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9316 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=4838, Invalid=33382, Unknown=0, NotChecked=0, Total=38220 [2022-11-03 02:08:52,785 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 2460 mSDsluCounter, 16245 mSDsCounter, 0 mSdLazyCounter, 3546 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2460 SdHoareTripleChecker+Valid, 16612 SdHoareTripleChecker+Invalid, 10180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6529 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:52,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2460 Valid, 16612 Invalid, 10180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3546 Invalid, 0 Unknown, 6529 Unchecked, 8.1s Time] [2022-11-03 02:08:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43494 states. [2022-11-03 02:08:54,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43494 to 14968. [2022-11-03 02:08:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14968 states, 14967 states have (on average 1.2233580543863165) internal successors, (18310), 14967 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14968 states to 14968 states and 18310 transitions. [2022-11-03 02:08:54,125 INFO L78 Accepts]: Start accepts. Automaton has 14968 states and 18310 transitions. Word has length 171 [2022-11-03 02:08:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:54,126 INFO L495 AbstractCegarLoop]: Abstraction has 14968 states and 18310 transitions. [2022-11-03 02:08:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.634408602150538) internal successors, (431), 93 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:54,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14968 states and 18310 transitions. [2022-11-03 02:08:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:08:54,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:54,129 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:54,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (123)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:54,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-03 02:08:54,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (122)] Ended with exit code 0 [2022-11-03 02:08:54,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:54,730 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash 677005553, now seen corresponding path program 2 times [2022-11-03 02:08:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:54,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85606330] [2022-11-03 02:08:54,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:08:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:54,732 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:54,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-03 02:08:55,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:08:55,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:08:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:08:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:08:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:09:05,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85606330] [2022-11-03 02:09:05,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85606330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [116936576] [2022-11-03 02:09:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:05,355 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:05,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Waiting until timeout for monitored process [2022-11-03 02:09:06,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:06,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:09:06,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:09:13,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:09:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [116936576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500824992] [2022-11-03 02:09:19,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:19,271 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-03 02:09:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:09:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:09:22,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:09:24,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500824992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:24,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:09:24,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 28, 28] total 88 [2022-11-03 02:09:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124848017] [2022-11-03 02:09:24,019 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-03 02:09:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:09:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-03 02:09:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=7188, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 02:09:24,021 INFO L87 Difference]: Start difference. First operand 14968 states and 18310 transitions. Second operand has 88 states, 88 states have (on average 4.875) internal successors, (429), 88 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 02:09:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:50,853 INFO L93 Difference]: Finished difference Result 39714 states and 48976 transitions. [2022-11-03 02:09:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-03 02:09:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.875) internal successors, (429), 88 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 171 [2022-11-03 02:09:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:50,874 INFO L225 Difference]: With dead ends: 39714 [2022-11-03 02:09:50,874 INFO L226 Difference]: Without dead ends: 39712 [2022-11-03 02:09:50,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 934 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5800 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=4115, Invalid=21325, Unknown=0, NotChecked=0, Total=25440 [2022-11-03 02:09:50,879 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 3843 mSDsluCounter, 16072 mSDsCounter, 0 mSdLazyCounter, 3527 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3843 SdHoareTripleChecker+Valid, 16550 SdHoareTripleChecker+Invalid, 9223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 3527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5558 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:50,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3843 Valid, 16550 Invalid, 9223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 3527 Invalid, 0 Unknown, 5558 Unchecked, 7.2s Time] [2022-11-03 02:09:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39712 states. [2022-11-03 02:09:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39712 to 15708. [2022-11-03 02:09:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15708 states, 15707 states have (on average 1.2237855733112626) internal successors, (19222), 15707 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15708 states to 15708 states and 19222 transitions. [2022-11-03 02:09:52,214 INFO L78 Accepts]: Start accepts. Automaton has 15708 states and 19222 transitions. Word has length 171 [2022-11-03 02:09:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:52,214 INFO L495 AbstractCegarLoop]: Abstraction has 15708 states and 19222 transitions. [2022-11-03 02:09:52,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.875) internal successors, (429), 88 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 02:09:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 15708 states and 19222 transitions. [2022-11-03 02:09:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:09:52,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:52,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:52,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:52,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-03 02:09:52,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (126)] Ended with exit code 0 [2022-11-03 02:09:52,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:52,818 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash 734323437, now seen corresponding path program 1 times [2022-11-03 02:09:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:09:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254060115] [2022-11-03 02:09:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:09:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:09:52,821 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:09:52,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-03 02:09:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:53,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:09:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:09:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:10:00,542 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:10:00,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254060115] [2022-11-03 02:10:00,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254060115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:00,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326953476] [2022-11-03 02:10:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:10:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:10:00,554 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:10:00,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-03 02:10:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:10:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:10:03,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:10:04,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326953476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:04,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364349917] [2022-11-03 02:10:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:04,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:04,287 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:04,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_560141f0-e187-4759-a3a2-3e0b29c210f2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-03 02:10:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:10:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:10:06,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:10:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364349917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:07,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:07,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24, 24, 25, 25] total 48 [2022-11-03 02:10:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386998540] [2022-11-03 02:10:07,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:07,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:10:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:10:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:10:07,668 INFO L87 Difference]: Start difference. First operand 15708 states and 19222 transitions. Second operand has 48 states, 48 states have (on average 5.541666666666667) internal successors, (266), 48 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)