./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.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_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/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_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/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_15b08bb8-b847-4904-b424-3f50fe3fa74c/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 7d79ac9efca779d1eb62e697c2372da1e7e08044af0835338f48b1231b98a56d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:16,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:16,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:16,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:16,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:16,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:16,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:16,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:16,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:16,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:16,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:16,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:16,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:16,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:16,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:16,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:16,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:16,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:16,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:16,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:16,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:16,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:16,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:16,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:16,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:17,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:17,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:17,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:17,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:17,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:17,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:17,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:17,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:17,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:17,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:17,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:17,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:17,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:17,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:17,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:17,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:17,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:35:17,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:17,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:17,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:17,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:17,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:17,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:17,079 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:17,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:17,080 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:17,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:17,081 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:17,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:17,082 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:17,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:17,082 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:17,083 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:17,083 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:17,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:17,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:17,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:17,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:17,085 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:17,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:17,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:17,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:17,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:17,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:17,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:17,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:17,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:17,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:17,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:17,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:17,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:17,089 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:17,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:17,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:17,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:17,090 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d79ac9efca779d1eb62e697c2372da1e7e08044af0835338f48b1231b98a56d [2022-11-03 02:35:17,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:17,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:17,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:17,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:17,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:17,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c [2022-11-03 02:35:17,667 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/509605bde/c4fdc422786446058760231b09d49311/FLAGc9a29b4d5 [2022-11-03 02:35:18,396 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:18,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c [2022-11-03 02:35:18,422 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/509605bde/c4fdc422786446058760231b09d49311/FLAGc9a29b4d5 [2022-11-03 02:35:18,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/509605bde/c4fdc422786446058760231b09d49311 [2022-11-03 02:35:18,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:18,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:18,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:18,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:18,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:18,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:18" (1/1) ... [2022-11-03 02:35:18,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658497c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:18, skipping insertion in model container [2022-11-03 02:35:18,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:18" (1/1) ... [2022-11-03 02:35:18,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:18,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:18,994 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c[1107,1120] [2022-11-03 02:35:19,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:19,187 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:19,200 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c[1107,1120] [2022-11-03 02:35:19,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:19,392 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:19,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19 WrapperNode [2022-11-03 02:35:19,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:19,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:19,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:19,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:19,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,642 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 835 [2022-11-03 02:35:19,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:19,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:19,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:19,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:19,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:19,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:19,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:19,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:19,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (1/1) ... [2022-11-03 02:35:19,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:19,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:19,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:19,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:19,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:20,271 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:20,273 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:21,672 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:23,488 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:23,489 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:23,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:23 BoogieIcfgContainer [2022-11-03 02:35:23,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:23,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:23,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:23,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:23,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:18" (1/3) ... [2022-11-03 02:35:23,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a38a02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:23, skipping insertion in model container [2022-11-03 02:35:23,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:19" (2/3) ... [2022-11-03 02:35:23,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a38a02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:23, skipping insertion in model container [2022-11-03 02:35:23,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:23" (3/3) ... [2022-11-03 02:35:23,508 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul9.c [2022-11-03 02:35:23,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:23,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:23,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:23,650 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;@3b1f5f96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:23,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:35:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:23,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:35:23,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:23,673 INFO L85 PathProgramCache]: Analyzing trace with hash 9916399, now seen corresponding path program 1 times [2022-11-03 02:35:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:23,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638456921] [2022-11-03 02:35:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:24,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:35:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:24,579 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:35:24,582 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:35:24,587 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:35:24,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:24,596 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:35:24,601 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:35:24,657 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:35:24,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:35:24 BoogieIcfgContainer [2022-11-03 02:35:24,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:35:24,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:35:24,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:35:24,680 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:35:24,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:23" (3/4) ... [2022-11-03 02:35:24,688 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:35:24,688 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:35:24,691 INFO L158 Benchmark]: Toolchain (without parser) took 6003.51ms. Allocated memory was 90.2MB in the beginning and 209.7MB in the end (delta: 119.5MB). Free memory was 54.5MB in the beginning and 120.5MB in the end (delta: -66.0MB). Peak memory consumption was 52.9MB. Max. memory is 16.1GB. [2022-11-03 02:35:24,692 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 90.2MB. Free memory is still 45.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:24,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 705.15ms. Allocated memory is still 90.2MB. Free memory was 54.3MB in the beginning and 47.7MB in the end (delta: 6.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:35:24,696 INFO L158 Benchmark]: Boogie Procedure Inliner took 247.86ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 47.7MB in the beginning and 78.9MB in the end (delta: -31.2MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2022-11-03 02:35:24,701 INFO L158 Benchmark]: Boogie Preprocessor took 173.55ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 72.0MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 02:35:24,704 INFO L158 Benchmark]: RCFGBuilder took 3675.14ms. Allocated memory was 111.1MB in the beginning and 209.7MB in the end (delta: 98.6MB). Free memory was 72.0MB in the beginning and 71.1MB in the end (delta: 975.2kB). Peak memory consumption was 119.5MB. Max. memory is 16.1GB. [2022-11-03 02:35:24,706 INFO L158 Benchmark]: TraceAbstraction took 1180.75ms. Allocated memory is still 209.7MB. Free memory was 70.0MB in the beginning and 120.6MB in the end (delta: -50.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:24,706 INFO L158 Benchmark]: Witness Printer took 10.03ms. Allocated memory is still 209.7MB. Free memory was 120.6MB in the beginning and 120.5MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:24,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 90.2MB. Free memory is still 45.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 705.15ms. Allocated memory is still 90.2MB. Free memory was 54.3MB in the beginning and 47.7MB in the end (delta: 6.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 247.86ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 47.7MB in the beginning and 78.9MB in the end (delta: -31.2MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 173.55ms. Allocated memory is still 111.1MB. Free memory was 78.9MB in the beginning and 72.0MB in the end (delta: 6.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 3675.14ms. Allocated memory was 111.1MB in the beginning and 209.7MB in the end (delta: 98.6MB). Free memory was 72.0MB in the beginning and 71.1MB in the end (delta: 975.2kB). Peak memory consumption was 119.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1180.75ms. Allocated memory is still 209.7MB. Free memory was 70.0MB in the beginning and 120.6MB in the end (delta: -50.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 10.03ms. Allocated memory is still 209.7MB. Free memory was 120.6MB in the beginning and 120.5MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 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: 1.0s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:35:24,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/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_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/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_15b08bb8-b847-4904-b424-3f50fe3fa74c/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 7d79ac9efca779d1eb62e697c2372da1e7e08044af0835338f48b1231b98a56d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:27,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:27,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:27,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:27,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:27,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:27,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:27,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:27,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:27,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:27,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:27,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:27,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:27,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:27,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:27,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:27,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:27,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:27,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:27,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:27,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:27,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:27,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:27,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:27,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:27,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:27,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:27,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:27,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:27,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:27,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:27,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:27,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:27,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:27,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:27,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:27,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:27,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:27,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:27,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:27,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:27,646 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:35:27,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:27,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:27,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:27,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:27,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:27,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:27,710 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:27,710 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:27,710 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:27,711 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:27,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:27,712 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:27,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:27,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:27,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:27,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:27,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:27,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:35:27,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:35:27,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:35:27,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:27,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:27,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:27,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:27,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:35:27,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:27,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:27,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:27,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:27,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:27,719 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:35:27,719 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:27,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:27,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:27,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:35:27,721 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d79ac9efca779d1eb62e697c2372da1e7e08044af0835338f48b1231b98a56d [2022-11-03 02:35:28,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:28,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:28,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:28,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:28,319 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:28,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c [2022-11-03 02:35:28,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/42a11d89d/fb27502cea05476c8c20b1f6cffc0d69/FLAG9428fb2d1 [2022-11-03 02:35:29,192 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:29,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c [2022-11-03 02:35:29,217 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/42a11d89d/fb27502cea05476c8c20b1f6cffc0d69/FLAG9428fb2d1 [2022-11-03 02:35:29,432 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/data/42a11d89d/fb27502cea05476c8c20b1f6cffc0d69 [2022-11-03 02:35:29,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:29,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:29,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:29,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:29,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:29,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:29" (1/1) ... [2022-11-03 02:35:29,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df0f298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:29, skipping insertion in model container [2022-11-03 02:35:29,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:29" (1/1) ... [2022-11-03 02:35:29,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:29,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:29,667 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c[1107,1120] [2022-11-03 02:35:29,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:29,926 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:29,953 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_15b08bb8-b847-4904-b424-3f50fe3fa74c/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul9.c[1107,1120] [2022-11-03 02:35:30,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:30,072 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:30,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30 WrapperNode [2022-11-03 02:35:30,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:30,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:30,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:30,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:30,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,240 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 835 [2022-11-03 02:35:30,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:30,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:30,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:30,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:30,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:30,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:30,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:30,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:30,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (1/1) ... [2022-11-03 02:35:30,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:30,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:30,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:30,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:30,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:30,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:30,734 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:31,823 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:31,835 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:31,835 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:35:31,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:31 BoogieIcfgContainer [2022-11-03 02:35:31,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:31,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:31,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:31,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:31,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:29" (1/3) ... [2022-11-03 02:35:31,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c379d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:31, skipping insertion in model container [2022-11-03 02:35:31,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:30" (2/3) ... [2022-11-03 02:35:31,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c379d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:31, skipping insertion in model container [2022-11-03 02:35:31,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:31" (3/3) ... [2022-11-03 02:35:31,850 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul9.c [2022-11-03 02:35:31,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:31,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:31,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:31,976 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;@5307a963, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:31,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:31,982 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 02:35:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:31,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:31,991 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 02:35:31,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1892373183, now seen corresponding path program 1 times [2022-11-03 02:35:32,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:32,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014000663] [2022-11-03 02:35:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:32,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:32,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:32,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:35:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:32,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:32,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:32,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014000663] [2022-11-03 02:35:32,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014000663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:32,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:32,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005154375] [2022-11-03 02:35:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:32,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:32,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:32,499 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 02:35:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:32,631 INFO L93 Difference]: Finished difference Result 321 states and 479 transitions. [2022-11-03 02:35:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:32,635 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 02:35:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:32,648 INFO L225 Difference]: With dead ends: 321 [2022-11-03 02:35:32,649 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:32,652 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 02:35:32,657 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 02:35:32,658 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 02:35:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 83. [2022-11-03 02:35:32,712 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 02:35:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2022-11-03 02:35:32,717 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 17 [2022-11-03 02:35:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:32,718 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2022-11-03 02:35:32,719 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 02:35:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2022-11-03 02:35:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:32,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:32,720 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 02:35:32,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:32,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1391476863, now seen corresponding path program 1 times [2022-11-03 02:35:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:32,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611680943] [2022-11-03 02:35:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:32,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:32,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:32,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:32,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:35:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:33,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:33,295 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:33,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611680943] [2022-11-03 02:35:33,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611680943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:33,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:33,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285304732] [2022-11-03 02:35:33,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:33,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:33,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:33,307 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 02:35:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:33,387 INFO L93 Difference]: Finished difference Result 317 states and 463 transitions. [2022-11-03 02:35:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:33,387 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 02:35:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:33,389 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:35:33,390 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:33,391 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 02:35:33,392 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 02:35:33,393 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 02:35:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 85. [2022-11-03 02:35:33,403 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 02:35:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 122 transitions. [2022-11-03 02:35:33,405 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 122 transitions. Word has length 17 [2022-11-03 02:35:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 122 transitions. [2022-11-03 02:35:33,406 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 02:35:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 122 transitions. [2022-11-03 02:35:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:33,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:33,407 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 02:35:33,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:33,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:33,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:33,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1649642301, now seen corresponding path program 1 times [2022-11-03 02:35:33,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279456886] [2022-11-03 02:35:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:33,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:33,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:35:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:33,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:33,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:33,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279456886] [2022-11-03 02:35:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279456886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:33,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:33,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:33,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771503053] [2022-11-03 02:35:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:33,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:33,969 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 02:35:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:34,032 INFO L93 Difference]: Finished difference Result 317 states and 462 transitions. [2022-11-03 02:35:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:34,033 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 02:35:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,034 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:35:34,035 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:34,035 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 02:35:34,037 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 02:35:34,038 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 02:35:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 87. [2022-11-03 02:35:34,047 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 02:35:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2022-11-03 02:35:34,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 17 [2022-11-03 02:35:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:34,049 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2022-11-03 02:35:34,049 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 02:35:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2022-11-03 02:35:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:34,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:34,050 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 02:35:34,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:34,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:34,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:34,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1256615291, now seen corresponding path program 1 times [2022-11-03 02:35:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996540466] [2022-11-03 02:35:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:34,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:34,277 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:34,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:35:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:34,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:34,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:34,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996540466] [2022-11-03 02:35:34,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996540466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:34,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:34,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:34,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369192855] [2022-11-03 02:35:34,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:34,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:34,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:34,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:34,557 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 02:35:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:34,614 INFO L93 Difference]: Finished difference Result 317 states and 461 transitions. [2022-11-03 02:35:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:34,615 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 02:35:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,617 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:35:34,617 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:34,618 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 02:35:34,619 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 02:35:34,619 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 02:35:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 89. [2022-11-03 02:35:34,627 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 02:35:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 126 transitions. [2022-11-03 02:35:34,628 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 126 transitions. Word has length 17 [2022-11-03 02:35:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:34,629 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 126 transitions. [2022-11-03 02:35:34,629 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 02:35:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 126 transitions. [2022-11-03 02:35:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:34,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:34,630 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 02:35:34,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:34,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:34,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:34,850 INFO L85 PathProgramCache]: Analyzing trace with hash 447268665, now seen corresponding path program 1 times [2022-11-03 02:35:34,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:34,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545470100] [2022-11-03 02:35:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:34,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:34,853 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:34,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:35:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:35,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:35,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545470100] [2022-11-03 02:35:35,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545470100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:35,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:35,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435760405] [2022-11-03 02:35:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:35,181 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 02:35:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:35,248 INFO L93 Difference]: Finished difference Result 317 states and 460 transitions. [2022-11-03 02:35:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:35,250 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 02:35:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:35,251 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:35:35,251 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:35,253 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 02:35:35,262 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 02:35:35,263 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 02:35:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:35,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 91. [2022-11-03 02:35:35,280 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 02:35:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2022-11-03 02:35:35,281 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 17 [2022-11-03 02:35:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:35,288 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2022-11-03 02:35:35,289 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 02:35:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2022-11-03 02:35:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:35,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:35,290 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 02:35:35,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:35,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:35,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 504526967, now seen corresponding path program 1 times [2022-11-03 02:35:35,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:35,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821295214] [2022-11-03 02:35:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:35,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:35,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:35:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:35,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:35:35,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:35,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:35,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:35,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821295214] [2022-11-03 02:35:35,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821295214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:35,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:35,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710754746] [2022-11-03 02:35:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:35,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:35,814 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 02:35:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:35,870 INFO L93 Difference]: Finished difference Result 317 states and 459 transitions. [2022-11-03 02:35:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:35,871 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 02:35:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:35,872 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:35:35,872 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 02:35:35,873 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 02:35:35,874 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 02:35:35,875 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 02:35:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 02:35:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 93. [2022-11-03 02:35:35,881 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 02:35:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2022-11-03 02:35:35,882 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 17 [2022-11-03 02:35:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:35,883 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2022-11-03 02:35:35,883 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 02:35:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2022-11-03 02:35:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:35:35,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:35,884 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 02:35:35,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:36,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:36,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:36,106 INFO L85 PathProgramCache]: Analyzing trace with hash 504586549, now seen corresponding path program 1 times [2022-11-03 02:35:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759229468] [2022-11-03 02:35:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:36,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:36,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:36,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:36,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:35:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:36,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 02:35:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:37,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:37,289 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759229468] [2022-11-03 02:35:37,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759229468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:37,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:37,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-03 02:35:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092809464] [2022-11-03 02:35:37,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:37,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:35:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:37,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:35:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:35:37,292 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 02:35:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:44,937 INFO L93 Difference]: Finished difference Result 652 states and 940 transitions. [2022-11-03 02:35:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 02:35:44,938 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 02:35:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:44,941 INFO L225 Difference]: With dead ends: 652 [2022-11-03 02:35:44,941 INFO L226 Difference]: Without dead ends: 650 [2022-11-03 02:35:44,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=971, Invalid=3585, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 02:35:44,944 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, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:44,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 2698 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 02:35:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-03 02:35:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 105. [2022-11-03 02:35:44,955 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 02:35:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 147 transitions. [2022-11-03 02:35:44,957 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 147 transitions. Word has length 17 [2022-11-03 02:35:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:44,957 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 147 transitions. [2022-11-03 02:35:44,957 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 02:35:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 147 transitions. [2022-11-03 02:35:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:44,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:44,961 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 02:35:44,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:45,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash -205572357, now seen corresponding path program 1 times [2022-11-03 02:35:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91621685] [2022-11-03 02:35:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:45,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:45,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:45,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:45,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:35:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:45,921 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 02:35:45,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:45,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91621685] [2022-11-03 02:35:45,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91621685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:45,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:45,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:45,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41060255] [2022-11-03 02:35:45,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:45,928 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 02:35:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:46,354 INFO L93 Difference]: Finished difference Result 351 states and 507 transitions. [2022-11-03 02:35:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:35:46,355 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 02:35:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:46,356 INFO L225 Difference]: With dead ends: 351 [2022-11-03 02:35:46,357 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 02:35:46,357 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 02:35:46,358 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:46,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 398 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 02:35:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 109. [2022-11-03 02:35:46,365 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 02:35:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2022-11-03 02:35:46,366 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 94 [2022-11-03 02:35:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:46,367 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2022-11-03 02:35:46,367 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 02:35:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2022-11-03 02:35:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:46,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:46,369 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 02:35:46,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:46,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:46,583 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:46,583 INFO L85 PathProgramCache]: Analyzing trace with hash -178506755, now seen corresponding path program 1 times [2022-11-03 02:35:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:46,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046170139] [2022-11-03 02:35:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:46,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:46,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:35:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:47,484 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 02:35:47,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:47,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046170139] [2022-11-03 02:35:47,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046170139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:47,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:47,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060099443] [2022-11-03 02:35:47,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:47,488 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 02:35:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:48,017 INFO L93 Difference]: Finished difference Result 380 states and 546 transitions. [2022-11-03 02:35:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:48,018 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 02:35:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:48,020 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:48,020 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:48,021 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 02:35:48,022 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 426 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:48,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 617 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:35:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 111. [2022-11-03 02:35:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3909090909090909) internal successors, (153), 110 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-11-03 02:35:48,030 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 94 [2022-11-03 02:35:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:48,030 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-11-03 02:35:48,030 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 02:35:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-11-03 02:35:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:48,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:48,033 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 02:35:48,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:48,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1555597695, now seen corresponding path program 1 times [2022-11-03 02:35:48,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:48,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656146606] [2022-11-03 02:35:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:48,255 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:48,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:48,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:48,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:35:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:35:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:48,994 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 02:35:48,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:48,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:48,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656146606] [2022-11-03 02:35:48,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656146606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:48,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:48,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:48,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666659866] [2022-11-03 02:35:48,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:48,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:48,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:48,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:48,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:48,997 INFO L87 Difference]: Start difference. First operand 111 states and 153 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 02:35:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:49,345 INFO L93 Difference]: Finished difference Result 294 states and 420 transitions. [2022-11-03 02:35:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:49,347 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 02:35:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:49,348 INFO L225 Difference]: With dead ends: 294 [2022-11-03 02:35:49,349 INFO L226 Difference]: Without dead ends: 203 [2022-11-03 02:35:49,349 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 02:35:49,350 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 311 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:49,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 437 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-03 02:35:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 113. [2022-11-03 02:35:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3839285714285714) internal successors, (155), 112 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2022-11-03 02:35:49,359 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 155 transitions. Word has length 94 [2022-11-03 02:35:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:49,360 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 155 transitions. [2022-11-03 02:35:49,360 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 02:35:49,360 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 155 transitions. [2022-11-03 02:35:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:49,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:49,369 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 02:35:49,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:49,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:49,594 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -828327043, now seen corresponding path program 1 times [2022-11-03 02:35:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923895228] [2022-11-03 02:35:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:49,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:49,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:49,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:35:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:50,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:50,449 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 02:35:50,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:50,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923895228] [2022-11-03 02:35:50,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923895228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:50,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:50,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629225102] [2022-11-03 02:35:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:50,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:50,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:50,451 INFO L87 Difference]: Start difference. First operand 113 states and 155 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 02:35:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:50,886 INFO L93 Difference]: Finished difference Result 380 states and 544 transitions. [2022-11-03 02:35:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:50,887 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 02:35:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:50,889 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:50,889 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:50,889 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 02:35:50,890 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 412 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 609 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 02:35:50,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 609 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 115. [2022-11-03 02:35:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3771929824561404) internal successors, (157), 114 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2022-11-03 02:35:50,902 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 94 [2022-11-03 02:35:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:50,905 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2022-11-03 02:35:50,905 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 02:35:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2022-11-03 02:35:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:50,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:50,909 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 02:35:50,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:51,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:51,134 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1795677697, now seen corresponding path program 1 times [2022-11-03 02:35:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226036739] [2022-11-03 02:35:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:51,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:51,138 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:51,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:35:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:51,844 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 02:35:51,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:51,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226036739] [2022-11-03 02:35:51,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226036739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:51,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:51,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:51,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9015538] [2022-11-03 02:35:51,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:51,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:51,847 INFO L87 Difference]: Start difference. First operand 115 states and 157 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 02:35:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:52,351 INFO L93 Difference]: Finished difference Result 380 states and 543 transitions. [2022-11-03 02:35:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:52,352 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 02:35:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:52,362 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:52,362 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:52,364 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 02:35:52,365 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 405 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 605 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 02:35:52,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 605 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 117. [2022-11-03 02:35:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3706896551724137) internal successors, (159), 116 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 159 transitions. [2022-11-03 02:35:52,375 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 159 transitions. Word has length 94 [2022-11-03 02:35:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:52,375 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 159 transitions. [2022-11-03 02:35:52,376 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 02:35:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 159 transitions. [2022-11-03 02:35:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:52,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:52,377 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 02:35:52,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:52,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:52,594 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2006663425, now seen corresponding path program 1 times [2022-11-03 02:35:52,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:52,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064757984] [2022-11-03 02:35:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:52,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:52,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:52,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:35:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:53,403 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 02:35:53,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:53,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:53,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064757984] [2022-11-03 02:35:53,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064757984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:53,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:53,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:53,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592506502] [2022-11-03 02:35:53,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:53,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:53,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:53,406 INFO L87 Difference]: Start difference. First operand 117 states and 159 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 02:35:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:53,834 INFO L93 Difference]: Finished difference Result 380 states and 542 transitions. [2022-11-03 02:35:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:53,835 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 02:35:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:53,836 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:53,837 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:53,837 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 02:35:53,838 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 388 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 595 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 02:35:53,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 595 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:35:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 123. [2022-11-03 02:35:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3688524590163935) internal successors, (167), 122 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 167 transitions. [2022-11-03 02:35:53,846 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 167 transitions. Word has length 94 [2022-11-03 02:35:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:53,847 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 167 transitions. [2022-11-03 02:35:53,847 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 02:35:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 167 transitions. [2022-11-03 02:35:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:53,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:53,849 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 02:35:53,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:54,070 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1589266819, now seen corresponding path program 1 times [2022-11-03 02:35:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270054678] [2022-11-03 02:35:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:54,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:54,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:35:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:54,817 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 02:35:54,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:54,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270054678] [2022-11-03 02:35:54,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270054678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:54,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:54,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632136528] [2022-11-03 02:35:54,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:54,820 INFO L87 Difference]: Start difference. First operand 123 states and 167 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 02:35:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:55,220 INFO L93 Difference]: Finished difference Result 380 states and 541 transitions. [2022-11-03 02:35:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:55,221 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 02:35:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:55,222 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:55,222 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:55,223 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 02:35:55,224 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 381 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 591 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 02:35:55,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 591 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:55,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 125. [2022-11-03 02:35:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 124 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2022-11-03 02:35:55,233 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 94 [2022-11-03 02:35:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:55,233 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2022-11-03 02:35:55,233 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 02:35:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2022-11-03 02:35:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:55,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:55,243 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 02:35:55,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:55,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:55,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:55,462 INFO L85 PathProgramCache]: Analyzing trace with hash -744125819, now seen corresponding path program 1 times [2022-11-03 02:35:55,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:55,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780970569] [2022-11-03 02:35:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:55,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:55,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:55,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:55,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:35:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:56,228 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 02:35:56,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:56,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:56,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780970569] [2022-11-03 02:35:56,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780970569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:56,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:56,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:56,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845596067] [2022-11-03 02:35:56,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:56,232 INFO L87 Difference]: Start difference. First operand 125 states and 169 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 02:35:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:56,595 INFO L93 Difference]: Finished difference Result 380 states and 540 transitions. [2022-11-03 02:35:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:56,596 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 02:35:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:56,598 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:56,598 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:56,598 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 02:35:56,599 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 374 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 587 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 02:35:56,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 587 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 127. [2022-11-03 02:35:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3571428571428572) internal successors, (171), 126 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 02:35:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 171 transitions. [2022-11-03 02:35:56,630 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 171 transitions. Word has length 94 [2022-11-03 02:35:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:56,630 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 171 transitions. [2022-11-03 02:35:56,631 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 02:35:56,631 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 171 transitions. [2022-11-03 02:35:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:56,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:56,634 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 02:35:56,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:56,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:56,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash -183426041, now seen corresponding path program 1 times [2022-11-03 02:35:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142232126] [2022-11-03 02:35:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:56,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:56,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:56,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:56,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:35:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:57,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:57,675 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 02:35:57,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:57,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142232126] [2022-11-03 02:35:57,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142232126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:57,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:57,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:57,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39963582] [2022-11-03 02:35:57,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:57,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:57,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:57,677 INFO L87 Difference]: Start difference. First operand 127 states and 171 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 02:35:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:58,078 INFO L93 Difference]: Finished difference Result 380 states and 539 transitions. [2022-11-03 02:35:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:58,079 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 02:35:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:58,081 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:58,081 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:58,082 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 02:35:58,083 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 367 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 583 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 02:35:58,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 583 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 129. [2022-11-03 02:35:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.3515625) internal successors, (173), 128 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2022-11-03 02:35:58,093 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 94 [2022-11-03 02:35:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:58,093 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2022-11-03 02:35:58,093 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 02:35:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2022-11-03 02:35:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:58,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:58,095 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 02:35:58,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:58,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1077491209, now seen corresponding path program 1 times [2022-11-03 02:35:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531680314] [2022-11-03 02:35:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:58,322 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:58,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:35:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:35:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:59,078 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 02:35:59,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:35:59,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:35:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531680314] [2022-11-03 02:35:59,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531680314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:59,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:59,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:35:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577459481] [2022-11-03 02:35:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:35:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:35:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:35:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:59,081 INFO L87 Difference]: Start difference. First operand 129 states and 173 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 02:35:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:59,491 INFO L93 Difference]: Finished difference Result 380 states and 538 transitions. [2022-11-03 02:35:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:59,492 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 02:35:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:59,494 INFO L225 Difference]: With dead ends: 380 [2022-11-03 02:35:59,494 INFO L226 Difference]: Without dead ends: 289 [2022-11-03 02:35:59,494 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 02:35:59,496 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 355 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 576 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 02:35:59,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 576 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-03 02:35:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 133. [2022-11-03 02:35:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3484848484848484) internal successors, (178), 132 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2022-11-03 02:35:59,514 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 94 [2022-11-03 02:35:59,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:59,514 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2022-11-03 02:35:59,514 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 02:35:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2022-11-03 02:35:59,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:35:59,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:59,516 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 02:35:59,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:35:59,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1521391883, now seen corresponding path program 1 times [2022-11-03 02:35:59,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:35:59,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610702407] [2022-11-03 02:35:59,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:59,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:35:59,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:35:59,734 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:35:59,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:36:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:00,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:36:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:01,249 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 02:36:01,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:01,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:01,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610702407] [2022-11-03 02:36:01,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610702407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:01,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:01,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-03 02:36:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11887175] [2022-11-03 02:36:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:36:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:36:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:36:01,253 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 02:36:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:04,522 INFO L93 Difference]: Finished difference Result 746 states and 1064 transitions. [2022-11-03 02:36:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:36:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 02:36:04,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:04,525 INFO L225 Difference]: With dead ends: 746 [2022-11-03 02:36:04,525 INFO L226 Difference]: Without dead ends: 655 [2022-11-03 02:36:04,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=503, Invalid=2359, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 02:36:04,527 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 2079 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 2623 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:04,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 2623 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 02:36:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-03 02:36:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 147. [2022-11-03 02:36:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.321917808219178) internal successors, (193), 146 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2022-11-03 02:36:04,540 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 94 [2022-11-03 02:36:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:04,540 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2022-11-03 02:36:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 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 02:36:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2022-11-03 02:36:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:04,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:04,542 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 02:36:04,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:04,767 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash -507194227, now seen corresponding path program 1 times [2022-11-03 02:36:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232255863] [2022-11-03 02:36:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:04,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:04,770 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:04,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:36:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:36:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:05,388 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 02:36:05,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:05,389 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:05,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232255863] [2022-11-03 02:36:05,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232255863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:05,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:05,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287206983] [2022-11-03 02:36:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:05,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:05,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:05,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:05,391 INFO L87 Difference]: Start difference. First operand 147 states and 193 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 02:36:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:05,458 INFO L93 Difference]: Finished difference Result 365 states and 512 transitions. [2022-11-03 02:36:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:05,459 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 02:36:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:05,461 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:36:05,461 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 02:36:05,461 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 02:36:05,462 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 217 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:05,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 440 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 02:36:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 151. [2022-11-03 02:36:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-11-03 02:36:05,473 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 94 [2022-11-03 02:36:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:05,474 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-11-03 02:36:05,474 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 02:36:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-11-03 02:36:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:05,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:05,476 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 02:36:05,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:05,694 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:05,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:05,695 INFO L85 PathProgramCache]: Analyzing trace with hash -522712945, now seen corresponding path program 1 times [2022-11-03 02:36:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356520165] [2022-11-03 02:36:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:05,697 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:05,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:36:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:36:06,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:06,319 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 02:36:06,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:06,319 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:06,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356520165] [2022-11-03 02:36:06,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356520165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:06,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:06,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349019842] [2022-11-03 02:36:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:06,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:06,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:06,321 INFO L87 Difference]: Start difference. First operand 151 states and 198 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 02:36:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:06,466 INFO L93 Difference]: Finished difference Result 365 states and 511 transitions. [2022-11-03 02:36:06,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:06,467 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 02:36:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:06,468 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:36:06,469 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 02:36:06,469 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 02:36:06,470 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 211 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 439 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 02:36:06,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 439 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 02:36:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 153. [2022-11-03 02:36:06,479 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 02:36:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-11-03 02:36:06,480 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 94 [2022-11-03 02:36:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:06,480 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-11-03 02:36:06,481 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 02:36:06,481 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-11-03 02:36:06,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:06,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:06,482 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 02:36:06,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:06,696 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash -875801327, now seen corresponding path program 1 times [2022-11-03 02:36:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:06,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658653090] [2022-11-03 02:36:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:06,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:06,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:06,700 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:06,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:36:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:07,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:36:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:07,398 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 02:36:07,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:07,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658653090] [2022-11-03 02:36:07,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658653090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:07,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:07,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596246908] [2022-11-03 02:36:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:07,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:07,401 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 02:36:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:07,462 INFO L93 Difference]: Finished difference Result 365 states and 510 transitions. [2022-11-03 02:36:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:07,463 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 02:36:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:07,466 INFO L225 Difference]: With dead ends: 365 [2022-11-03 02:36:07,466 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 02:36:07,466 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 02:36:07,467 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 205 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 435 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 02:36:07,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 435 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 02:36:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 155. [2022-11-03 02:36:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3116883116883118) internal successors, (202), 154 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2022-11-03 02:36:07,477 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 94 [2022-11-03 02:36:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:07,478 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2022-11-03 02:36:07,478 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 02:36:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2022-11-03 02:36:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:07,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:07,480 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 02:36:07,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:07,705 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 17685011, now seen corresponding path program 1 times [2022-11-03 02:36:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:07,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999572732] [2022-11-03 02:36:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:07,707 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:07,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:36:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:08,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:08,388 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 02:36:08,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:08,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:08,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999572732] [2022-11-03 02:36:08,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999572732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:08,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:08,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572034259] [2022-11-03 02:36:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:08,391 INFO L87 Difference]: Start difference. First operand 155 states and 202 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 02:36:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:08,493 INFO L93 Difference]: Finished difference Result 251 states and 342 transitions. [2022-11-03 02:36:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:08,494 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 02:36:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:08,494 INFO L225 Difference]: With dead ends: 251 [2022-11-03 02:36:08,495 INFO L226 Difference]: Without dead ends: 160 [2022-11-03 02:36:08,495 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 02:36:08,496 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 177 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 218 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 02:36:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 218 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-03 02:36:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-11-03 02:36:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 154 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-11-03 02:36:08,506 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 94 [2022-11-03 02:36:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:08,507 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-11-03 02:36:08,507 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 02:36:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-11-03 02:36:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:08,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:08,509 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 02:36:08,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:08,733 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1827682155, now seen corresponding path program 1 times [2022-11-03 02:36:08,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:08,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120651165] [2022-11-03 02:36:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:08,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:08,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:08,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:08,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:36:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:09,652 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 02:36:09,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:09,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:09,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120651165] [2022-11-03 02:36:09,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120651165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:09,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:09,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:09,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382930783] [2022-11-03 02:36:09,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:09,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:09,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:09,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:09,655 INFO L87 Difference]: Start difference. First operand 155 states and 201 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 02:36:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:10,321 INFO L93 Difference]: Finished difference Result 432 states and 602 transitions. [2022-11-03 02:36:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:10,321 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 02:36:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:10,323 INFO L225 Difference]: With dead ends: 432 [2022-11-03 02:36:10,323 INFO L226 Difference]: Without dead ends: 341 [2022-11-03 02:36:10,324 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 02:36:10,324 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 373 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 710 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 02:36:10,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 710 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:36:10,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-03 02:36:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 163. [2022-11-03 02:36:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3024691358024691) internal successors, (211), 162 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 211 transitions. [2022-11-03 02:36:10,339 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 211 transitions. Word has length 94 [2022-11-03 02:36:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:10,339 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 211 transitions. [2022-11-03 02:36:10,340 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 02:36:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 211 transitions. [2022-11-03 02:36:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:10,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:10,341 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 02:36:10,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:10,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:10,554 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:10,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1168150633, now seen corresponding path program 1 times [2022-11-03 02:36:10,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:10,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583086534] [2022-11-03 02:36:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:10,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:10,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:10,557 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:10,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:36:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:11,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:11,495 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 02:36:11,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:11,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583086534] [2022-11-03 02:36:11,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583086534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:11,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:11,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429990011] [2022-11-03 02:36:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:11,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:11,497 INFO L87 Difference]: Start difference. First operand 163 states and 211 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 02:36:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:12,212 INFO L93 Difference]: Finished difference Result 347 states and 477 transitions. [2022-11-03 02:36:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:12,213 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 02:36:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:12,213 INFO L225 Difference]: With dead ends: 347 [2022-11-03 02:36:12,214 INFO L226 Difference]: Without dead ends: 256 [2022-11-03 02:36:12,214 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 02:36:12,215 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 449 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:12,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 498 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:36:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-03 02:36:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2022-11-03 02:36:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.298780487804878) internal successors, (213), 164 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 213 transitions. [2022-11-03 02:36:12,225 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 213 transitions. Word has length 94 [2022-11-03 02:36:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:12,226 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 213 transitions. [2022-11-03 02:36:12,226 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 02:36:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 213 transitions. [2022-11-03 02:36:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:12,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:12,228 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 02:36:12,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 02:36:12,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:12,438 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2012156135, now seen corresponding path program 1 times [2022-11-03 02:36:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:12,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620070928] [2022-11-03 02:36:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:12,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:12,441 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:12,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:36:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:12,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:12,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:13,384 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 02:36:13,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:13,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:13,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620070928] [2022-11-03 02:36:13,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620070928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:13,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:13,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:13,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746427473] [2022-11-03 02:36:13,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:13,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:13,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:13,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:13,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:13,387 INFO L87 Difference]: Start difference. First operand 165 states and 213 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 02:36:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:14,047 INFO L93 Difference]: Finished difference Result 443 states and 612 transitions. [2022-11-03 02:36:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:14,049 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 02:36:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:14,050 INFO L225 Difference]: With dead ends: 443 [2022-11-03 02:36:14,050 INFO L226 Difference]: Without dead ends: 350 [2022-11-03 02:36:14,051 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 02:36:14,052 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 364 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 707 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 02:36:14,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 707 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:36:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-03 02:36:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 169. [2022-11-03 02:36:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 168 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2022-11-03 02:36:14,063 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 94 [2022-11-03 02:36:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:14,064 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2022-11-03 02:36:14,064 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 02:36:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2022-11-03 02:36:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:14,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:14,065 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 02:36:14,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:14,289 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2084542693, now seen corresponding path program 1 times [2022-11-03 02:36:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:14,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733543236] [2022-11-03 02:36:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:14,292 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:14,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:36:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:15,239 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 02:36:15,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:15,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:15,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733543236] [2022-11-03 02:36:15,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733543236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:15,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:15,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:15,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395264834] [2022-11-03 02:36:15,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:15,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:15,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:15,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:15,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:15,242 INFO L87 Difference]: Start difference. First operand 169 states and 217 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 02:36:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:15,915 INFO L93 Difference]: Finished difference Result 446 states and 615 transitions. [2022-11-03 02:36:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:15,916 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 02:36:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:15,918 INFO L225 Difference]: With dead ends: 446 [2022-11-03 02:36:15,919 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 02:36:15,919 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 02:36:15,920 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 361 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 706 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 02:36:15,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 706 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:36:15,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 02:36:15,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2022-11-03 02:36:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2022-11-03 02:36:15,931 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 94 [2022-11-03 02:36:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:15,931 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2022-11-03 02:36:15,932 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 02:36:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2022-11-03 02:36:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:15,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:15,933 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 02:36:15,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:16,146 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1382942819, now seen corresponding path program 1 times [2022-11-03 02:36:16,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380010728] [2022-11-03 02:36:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:16,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:16,149 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:16,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:36:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:17,000 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 02:36:17,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:17,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380010728] [2022-11-03 02:36:17,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380010728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:17,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642863413] [2022-11-03 02:36:17,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:17,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:17,004 INFO L87 Difference]: Start difference. First operand 171 states and 219 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 02:36:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:17,624 INFO L93 Difference]: Finished difference Result 448 states and 617 transitions. [2022-11-03 02:36:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:17,624 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 02:36:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:17,626 INFO L225 Difference]: With dead ends: 448 [2022-11-03 02:36:17,626 INFO L226 Difference]: Without dead ends: 355 [2022-11-03 02:36:17,627 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 02:36:17,627 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 358 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:17,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 705 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:36:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-03 02:36:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 173. [2022-11-03 02:36:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.2848837209302326) internal successors, (221), 172 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 221 transitions. [2022-11-03 02:36:17,637 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 221 transitions. Word has length 94 [2022-11-03 02:36:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:17,637 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 221 transitions. [2022-11-03 02:36:17,638 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 02:36:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 221 transitions. [2022-11-03 02:36:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:17,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:17,639 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 02:36:17,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 02:36:17,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:17,854 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:17,855 INFO L85 PathProgramCache]: Analyzing trace with hash 3260575, now seen corresponding path program 1 times [2022-11-03 02:36:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808453249] [2022-11-03 02:36:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:17,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:17,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:17,871 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:36:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:18,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:18,759 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 02:36:18,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:18,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808453249] [2022-11-03 02:36:18,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808453249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:18,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:18,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074272218] [2022-11-03 02:36:18,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:18,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:18,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:18,761 INFO L87 Difference]: Start difference. First operand 173 states and 221 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 02:36:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:19,312 INFO L93 Difference]: Finished difference Result 361 states and 491 transitions. [2022-11-03 02:36:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:19,312 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 02:36:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:19,314 INFO L225 Difference]: With dead ends: 361 [2022-11-03 02:36:19,314 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 02:36:19,315 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 02:36:19,315 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 433 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 514 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 02:36:19,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 514 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:36:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 02:36:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 175. [2022-11-03 02:36:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 174 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 223 transitions. [2022-11-03 02:36:19,325 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 223 transitions. Word has length 94 [2022-11-03 02:36:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:19,326 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 223 transitions. [2022-11-03 02:36:19,326 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 02:36:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 223 transitions. [2022-11-03 02:36:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:19,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:19,327 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 02:36:19,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:19,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:19,546 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1926488609, now seen corresponding path program 1 times [2022-11-03 02:36:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117450746] [2022-11-03 02:36:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:19,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:19,550 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:19,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:36:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:20,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:20,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:20,408 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 02:36:20,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:20,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117450746] [2022-11-03 02:36:20,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117450746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:20,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:20,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456670971] [2022-11-03 02:36:20,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:20,410 INFO L87 Difference]: Start difference. First operand 175 states and 223 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 02:36:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:20,957 INFO L93 Difference]: Finished difference Result 459 states and 628 transitions. [2022-11-03 02:36:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:20,958 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 02:36:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:20,960 INFO L225 Difference]: With dead ends: 459 [2022-11-03 02:36:20,960 INFO L226 Difference]: Without dead ends: 364 [2022-11-03 02:36:20,961 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 02:36:20,961 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 352 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 703 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:36:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-03 02:36:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 179. [2022-11-03 02:36:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.2752808988764044) internal successors, (227), 178 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 227 transitions. [2022-11-03 02:36:20,971 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 227 transitions. Word has length 94 [2022-11-03 02:36:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:20,972 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 227 transitions. [2022-11-03 02:36:20,972 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 02:36:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 227 transitions. [2022-11-03 02:36:20,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:20,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:20,973 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 02:36:20,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:21,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:21,198 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2067037219, now seen corresponding path program 1 times [2022-11-03 02:36:21,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890028363] [2022-11-03 02:36:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:21,200 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:21,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:36:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:36:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:22,101 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 02:36:22,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:22,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:22,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890028363] [2022-11-03 02:36:22,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890028363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:22,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:22,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078600979] [2022-11-03 02:36:22,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:22,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:22,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:22,105 INFO L87 Difference]: Start difference. First operand 179 states and 227 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 02:36:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:22,637 INFO L93 Difference]: Finished difference Result 372 states and 502 transitions. [2022-11-03 02:36:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:22,637 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 02:36:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:22,638 INFO L225 Difference]: With dead ends: 372 [2022-11-03 02:36:22,638 INFO L226 Difference]: Without dead ends: 277 [2022-11-03 02:36:22,639 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 02:36:22,639 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 419 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:22,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 527 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:36:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-03 02:36:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 181. [2022-11-03 02:36:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2722222222222221) internal successors, (229), 180 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 229 transitions. [2022-11-03 02:36:22,647 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 229 transitions. Word has length 94 [2022-11-03 02:36:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:22,648 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 229 transitions. [2022-11-03 02:36:22,648 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 02:36:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 229 transitions. [2022-11-03 02:36:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:22,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:22,649 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 02:36:22,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:22,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:22,862 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1805228251, now seen corresponding path program 1 times [2022-11-03 02:36:22,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:22,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154747846] [2022-11-03 02:36:22,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:22,864 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:22,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:36:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:23,771 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 02:36:23,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:23,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154747846] [2022-11-03 02:36:23,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154747846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:23,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:23,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:23,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853524794] [2022-11-03 02:36:23,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:23,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:23,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:23,774 INFO L87 Difference]: Start difference. First operand 181 states and 229 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 02:36:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:24,439 INFO L93 Difference]: Finished difference Result 570 states and 781 transitions. [2022-11-03 02:36:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:24,440 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 02:36:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:24,441 INFO L225 Difference]: With dead ends: 570 [2022-11-03 02:36:24,441 INFO L226 Difference]: Without dead ends: 473 [2022-11-03 02:36:24,441 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 02:36:24,442 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 463 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 764 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 02:36:24,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 764 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:36:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-03 02:36:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 189. [2022-11-03 02:36:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2712765957446808) internal successors, (239), 188 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 239 transitions. [2022-11-03 02:36:24,452 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 239 transitions. Word has length 94 [2022-11-03 02:36:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:24,453 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 239 transitions. [2022-11-03 02:36:24,453 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 02:36:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 239 transitions. [2022-11-03 02:36:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:24,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:24,454 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 02:36:24,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 02:36:24,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:24,670 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash 800795303, now seen corresponding path program 1 times [2022-11-03 02:36:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673440958] [2022-11-03 02:36:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:24,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:24,672 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:24,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:36:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:25,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:36:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:25,538 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 02:36:25,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:25,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:25,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673440958] [2022-11-03 02:36:25,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673440958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:25,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:36:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286732764] [2022-11-03 02:36:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:25,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:25,541 INFO L87 Difference]: Start difference. First operand 189 states and 239 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 02:36:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:26,151 INFO L93 Difference]: Finished difference Result 576 states and 788 transitions. [2022-11-03 02:36:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:26,153 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 02:36:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:26,154 INFO L225 Difference]: With dead ends: 576 [2022-11-03 02:36:26,155 INFO L226 Difference]: Without dead ends: 479 [2022-11-03 02:36:26,155 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 02:36:26,156 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 458 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:26,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 768 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:36:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-03 02:36:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 193. [2022-11-03 02:36:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2708333333333333) internal successors, (244), 192 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 244 transitions. [2022-11-03 02:36:26,165 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 244 transitions. Word has length 94 [2022-11-03 02:36:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:26,166 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 244 transitions. [2022-11-03 02:36:26,166 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 02:36:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 244 transitions. [2022-11-03 02:36:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:26,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:26,167 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 02:36:26,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:26,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:26,390 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:26,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -787552599, now seen corresponding path program 1 times [2022-11-03 02:36:26,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:26,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518840076] [2022-11-03 02:36:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:26,392 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:26,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:36:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:27,014 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 02:36:27,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:27,206 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 02:36:27,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518840076] [2022-11-03 02:36:27,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518840076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:27,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358826108] [2022-11-03 02:36:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:27,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:27,209 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:27,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:36:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:27,867 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 02:36:27,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:28,078 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 02:36:28,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358826108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489904372] [2022-11-03 02:36:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:28,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:28,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:28,086 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:28,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 02:36:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:28,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:28,585 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 02:36:28,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:28,782 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 02:36:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489904372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:28,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:28,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2022-11-03 02:36:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602160845] [2022-11-03 02:36:28,784 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:28,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:28,785 INFO L87 Difference]: Start difference. First operand 193 states and 244 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 02:36:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:28,999 INFO L93 Difference]: Finished difference Result 470 states and 637 transitions. [2022-11-03 02:36:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:29,000 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 02:36:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:29,002 INFO L225 Difference]: With dead ends: 470 [2022-11-03 02:36:29,002 INFO L226 Difference]: Without dead ends: 373 [2022-11-03 02:36:29,003 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 02:36:29,003 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 621 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 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 02:36:29,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 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 02:36:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-03 02:36:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 198. [2022-11-03 02:36:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.2690355329949239) internal successors, (250), 197 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2022-11-03 02:36:29,013 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 94 [2022-11-03 02:36:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:29,013 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2022-11-03 02:36:29,013 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 02:36:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2022-11-03 02:36:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:29,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:29,014 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 02:36:29,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-03 02:36:29,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 02:36:29,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 02:36:29,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:29,627 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1798669849, now seen corresponding path program 1 times [2022-11-03 02:36:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:29,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408580182] [2022-11-03 02:36:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:29,629 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:29,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:36:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:30,347 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 02:36:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:30,532 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 02:36:30,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408580182] [2022-11-03 02:36:30,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408580182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629905219] [2022-11-03 02:36:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:30,532 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:30,534 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:30,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 02:36:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:31,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:31,176 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 02:36:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:31,362 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 02:36:31,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629905219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:31,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168423777] [2022-11-03 02:36:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:31,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:31,366 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:31,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 02:36:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:31,941 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 02:36:31,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:32,118 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 02:36:32,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168423777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:32,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:32,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 6 [2022-11-03 02:36:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327912764] [2022-11-03 02:36:32,118 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:36:32,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:36:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:32,120 INFO L87 Difference]: Start difference. First operand 198 states and 250 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 02:36:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:32,265 INFO L93 Difference]: Finished difference Result 471 states and 637 transitions. [2022-11-03 02:36:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:36:32,266 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 02:36:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:32,267 INFO L225 Difference]: With dead ends: 471 [2022-11-03 02:36:32,267 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 02:36:32,267 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 02:36:32,268 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 614 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 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 02:36:32,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 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 02:36:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 02:36:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 200. [2022-11-03 02:36:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.2663316582914572) internal successors, (252), 199 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 252 transitions. [2022-11-03 02:36:32,277 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 252 transitions. Word has length 94 [2022-11-03 02:36:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:32,277 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 252 transitions. [2022-11-03 02:36:32,277 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 02:36:32,277 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 252 transitions. [2022-11-03 02:36:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:32,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:32,278 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 02:36:32,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:32,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 02:36:32,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 02:36:32,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:32,907 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1540504411, now seen corresponding path program 1 times [2022-11-03 02:36:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64215382] [2022-11-03 02:36:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:32,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:32,909 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:36:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:36:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:34,322 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 02:36:34,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:35,043 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 02:36:35,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:35,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64215382] [2022-11-03 02:36:35,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64215382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:35,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [879509947] [2022-11-03 02:36:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:35,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:35,047 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:35,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:36:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:36:36,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:36,557 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 02:36:36,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:37,149 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 02:36:37,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [879509947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519045420] [2022-11-03 02:36:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:37,152 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:37,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:36:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:36:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:38,079 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 02:36:38,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:38,656 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 02:36:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519045420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:38,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:38,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-03 02:36:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692469603] [2022-11-03 02:36:38,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:36:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:36:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:36:38,660 INFO L87 Difference]: Start difference. First operand 200 states and 252 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 02:36:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:39,115 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2022-11-03 02:36:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:36:39,115 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 02:36:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:39,118 INFO L225 Difference]: With dead ends: 381 [2022-11-03 02:36:39,119 INFO L226 Difference]: Without dead ends: 284 [2022-11-03 02:36:39,119 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 02:36:39,120 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 142 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:39,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 709 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 02:36:39,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-03 02:36:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-11-03 02:36:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.265017667844523) internal successors, (358), 283 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2022-11-03 02:36:39,146 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 94 [2022-11-03 02:36:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:39,147 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2022-11-03 02:36:39,147 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 02:36:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2022-11-03 02:36:39,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:39,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:39,148 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 02:36:39,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:39,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-03 02:36:39,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:36:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:39,759 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1483246109, now seen corresponding path program 1 times [2022-11-03 02:36:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:39,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504308292] [2022-11-03 02:36:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:39,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:39,761 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:39,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:36:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:36:40,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:41,090 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 02:36:41,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:41,839 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 02:36:41,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504308292] [2022-11-03 02:36:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504308292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524629660] [2022-11-03 02:36:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:41,848 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:41,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:36:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:36:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:42,622 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 02:36:42,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:42,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524629660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:42,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:36:42,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 19 [2022-11-03 02:36:42,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469933236] [2022-11-03 02:36:42,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:42,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:36:42,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:36:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:36:42,624 INFO L87 Difference]: Start difference. First operand 284 states and 358 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 02:36:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:43,379 INFO L93 Difference]: Finished difference Result 679 states and 911 transitions. [2022-11-03 02:36:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:36:43,379 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 02:36:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:43,381 INFO L225 Difference]: With dead ends: 679 [2022-11-03 02:36:43,381 INFO L226 Difference]: Without dead ends: 533 [2022-11-03 02:36:43,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:36:43,382 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 977 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:43,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 680 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:43,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-03 02:36:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 286. [2022-11-03 02:36:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.2596491228070175) internal successors, (359), 285 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 359 transitions. [2022-11-03 02:36:43,404 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 359 transitions. Word has length 94 [2022-11-03 02:36:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:43,404 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 359 transitions. [2022-11-03 02:36:43,404 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 02:36:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 359 transitions. [2022-11-03 02:36:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:36:43,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:43,406 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 02:36:43,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:43,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 02:36:43,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:43,810 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1483186527, now seen corresponding path program 1 times [2022-11-03 02:36:43,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:43,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149244004] [2022-11-03 02:36:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:43,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:43,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:43,813 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:43,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:36:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:36:44,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:46,128 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 02:36:46,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:51,000 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 02:36:51,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149244004] [2022-11-03 02:36:51,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149244004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:51,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388381223] [2022-11-03 02:36:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:51,004 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:51,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:36:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:36:52,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:56,307 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 02:36:56,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:01,067 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 02:37:01,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388381223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:01,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325990669] [2022-11-03 02:37:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:01,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:01,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:01,069 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-03 02:37:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:37:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:03,384 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 02:37:03,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:04,604 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 02:37:04,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325990669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:04,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:04,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 67 [2022-11-03 02:37:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245178642] [2022-11-03 02:37:04,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:37:04,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:37:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=4034, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:37:04,614 INFO L87 Difference]: Start difference. First operand 286 states and 359 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 02:37:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:20,684 INFO L93 Difference]: Finished difference Result 1312 states and 1753 transitions. [2022-11-03 02:37:20,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-03 02:37:20,685 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 02:37:20,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:20,688 INFO L225 Difference]: With dead ends: 1312 [2022-11-03 02:37:20,688 INFO L226 Difference]: Without dead ends: 1310 [2022-11-03 02:37:20,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 506 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3846 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=2568, Invalid=13182, Unknown=0, NotChecked=0, Total=15750 [2022-11-03 02:37:20,691 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 5735 mSDsluCounter, 4646 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5735 SdHoareTripleChecker+Valid, 4826 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2653 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:20,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5735 Valid, 4826 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1270 Invalid, 0 Unknown, 2653 Unchecked, 3.8s Time] [2022-11-03 02:37:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-11-03 02:37:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 438. [2022-11-03 02:37:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.2608695652173914) internal successors, (551), 437 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 02:37:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 551 transitions. [2022-11-03 02:37:20,743 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 551 transitions. Word has length 94 [2022-11-03 02:37:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:20,744 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 551 transitions. [2022-11-03 02:37:20,744 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 02:37:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 551 transitions. [2022-11-03 02:37:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:37:20,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:20,745 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 02:37:20,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-03 02:37:20,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-03 02:37:21,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:21,355 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2002434143, now seen corresponding path program 1 times [2022-11-03 02:37:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976195464] [2022-11-03 02:37:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:21,357 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:21,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 02:37:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:21,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:37:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:22,353 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 02:37:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:22,672 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 02:37:22,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:22,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976195464] [2022-11-03 02:37:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976195464] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:22,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:22,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-03 02:37:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930929898] [2022-11-03 02:37:22,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:37:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:37:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:22,675 INFO L87 Difference]: Start difference. First operand 438 states and 551 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 02:37:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:23,101 INFO L93 Difference]: Finished difference Result 866 states and 1147 transitions. [2022-11-03 02:37:23,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:37:23,102 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 02:37:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:23,104 INFO L225 Difference]: With dead ends: 866 [2022-11-03 02:37:23,104 INFO L226 Difference]: Without dead ends: 638 [2022-11-03 02:37:23,105 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 02:37:23,106 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 612 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:23,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1027 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-03 02:37:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-03 02:37:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 444. [2022-11-03 02:37:23,151 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 02:37:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 558 transitions. [2022-11-03 02:37:23,152 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 558 transitions. Word has length 94 [2022-11-03 02:37:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:23,153 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 558 transitions. [2022-11-03 02:37:23,153 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 02:37:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 558 transitions. [2022-11-03 02:37:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:37:23,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:23,154 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 02:37:23,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:23,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:23,378 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:23,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1876213537, now seen corresponding path program 1 times [2022-11-03 02:37:23,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:23,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509967851] [2022-11-03 02:37:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:23,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:23,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:23,381 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 02:37:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:37:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:24,384 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 02:37:24,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:24,711 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 02:37:24,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509967851] [2022-11-03 02:37:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509967851] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:37:24,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:37:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-11-03 02:37:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870513335] [2022-11-03 02:37:24,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:37:24,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:37:24,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:37:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:37:24,715 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 02:37:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:37:25,045 INFO L93 Difference]: Finished difference Result 872 states and 1151 transitions. [2022-11-03 02:37:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:37:25,046 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 02:37:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:37:25,048 INFO L225 Difference]: With dead ends: 872 [2022-11-03 02:37:25,049 INFO L226 Difference]: Without dead ends: 638 [2022-11-03 02:37:25,050 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 02:37:25,051 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 824 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:37:25,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 795 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-03 02:37:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-03 02:37:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 444. [2022-11-03 02:37:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.255079006772009) internal successors, (556), 443 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:37:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 556 transitions. [2022-11-03 02:37:25,126 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 556 transitions. Word has length 94 [2022-11-03 02:37:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:37:25,127 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 556 transitions. [2022-11-03 02:37:25,127 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 02:37:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 556 transitions. [2022-11-03 02:37:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:37:25,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:37:25,128 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 02:37:25,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:37:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:37:25,354 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:37:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:37:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1964151133, now seen corresponding path program 1 times [2022-11-03 02:37:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:37:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677910525] [2022-11-03 02:37:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:25,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:37:25,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:37:25,357 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:37:25,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:37:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:37:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:27,679 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 02:37:27,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:33,997 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 02:37:33,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:37:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677910525] [2022-11-03 02:37:33,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677910525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1393226720] [2022-11-03 02:37:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:33,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:37:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:37:33,999 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:37:34,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:37:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:37:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:39,902 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 02:37:39,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:49,537 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 02:37:49,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1393226720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:49,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633846309] [2022-11-03 02:37:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:37:49,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:37:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:37:49,543 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:37:49,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:37:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:37:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:37:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:37:51,505 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 02:37:51,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:37:52,944 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 02:37:52,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633846309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:52,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:37:52,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 23, 23] total 75 [2022-11-03 02:37:52,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740502214] [2022-11-03 02:37:52,946 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:37:52,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-03 02:37:52,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:37:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-03 02:37:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=5112, Unknown=1, NotChecked=0, Total=5550 [2022-11-03 02:37:52,948 INFO L87 Difference]: Start difference. First operand 444 states and 556 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 02:38:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:12,544 INFO L93 Difference]: Finished difference Result 1225 states and 1628 transitions. [2022-11-03 02:38:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:38:12,545 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 02:38:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:12,549 INFO L225 Difference]: With dead ends: 1225 [2022-11-03 02:38:12,550 INFO L226 Difference]: Without dead ends: 1223 [2022-11-03 02:38:12,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 493 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4068 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=2593, Invalid=13662, Unknown=1, NotChecked=0, Total=16256 [2022-11-03 02:38:12,556 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 4200 mSDsluCounter, 6565 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4200 SdHoareTripleChecker+Valid, 6815 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5050 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:12,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4200 Valid, 6815 Invalid, 7569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2436 Invalid, 0 Unknown, 5050 Unchecked, 7.0s Time] [2022-11-03 02:38:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-11-03 02:38:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 448. [2022-11-03 02:38:12,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.2572706935123044) internal successors, (562), 447 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 562 transitions. [2022-11-03 02:38:12,617 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 562 transitions. Word has length 94 [2022-11-03 02:38:12,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 562 transitions. [2022-11-03 02:38:12,618 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 02:38:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 562 transitions. [2022-11-03 02:38:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:38:12,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:12,619 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 02:38:12,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:12,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-03 02:38:13,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-03 02:38:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:13,239 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:13,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1964091551, now seen corresponding path program 1 times [2022-11-03 02:38:13,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:13,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170937849] [2022-11-03 02:38:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:13,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:13,241 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:13,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:38:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:13,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:14,211 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 02:38:14,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:14,570 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 02:38:14,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:14,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170937849] [2022-11-03 02:38:14,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170937849] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:14,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:38:14,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:38:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324653420] [2022-11-03 02:38:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:14,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:38:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:14,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:38:14,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:38:14,578 INFO L87 Difference]: Start difference. First operand 448 states and 562 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 02:38:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:15,328 INFO L93 Difference]: Finished difference Result 920 states and 1212 transitions. [2022-11-03 02:38:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:38:15,329 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 02:38:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:15,333 INFO L225 Difference]: With dead ends: 920 [2022-11-03 02:38:15,333 INFO L226 Difference]: Without dead ends: 682 [2022-11-03 02:38:15,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:38:15,335 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 546 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 849 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 02:38:15,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 849 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-03 02:38:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 448. [2022-11-03 02:38:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.2527964205816555) internal successors, (560), 447 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 560 transitions. [2022-11-03 02:38:15,378 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 560 transitions. Word has length 94 [2022-11-03 02:38:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:15,379 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 560 transitions. [2022-11-03 02:38:15,379 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 02:38:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 560 transitions. [2022-11-03 02:38:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:38:15,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:15,380 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 02:38:15,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:15,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:15,603 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1521469537, now seen corresponding path program 1 times [2022-11-03 02:38:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687347759] [2022-11-03 02:38:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:15,606 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:15,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:38:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:16,603 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 02:38:16,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:16,980 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 02:38:16,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:16,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687347759] [2022-11-03 02:38:16,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687347759] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:16,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:38:16,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:38:16,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906411466] [2022-11-03 02:38:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:38:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:38:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:38:16,983 INFO L87 Difference]: Start difference. First operand 448 states and 560 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 02:38:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:17,876 INFO L93 Difference]: Finished difference Result 1093 states and 1441 transitions. [2022-11-03 02:38:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:38:17,876 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 02:38:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:17,879 INFO L225 Difference]: With dead ends: 1093 [2022-11-03 02:38:17,880 INFO L226 Difference]: Without dead ends: 855 [2022-11-03 02:38:17,881 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 02:38:17,881 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 905 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:17,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 727 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:38:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-11-03 02:38:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 450. [2022-11-03 02:38:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2494432071269488) internal successors, (561), 449 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 02:38:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 561 transitions. [2022-11-03 02:38:17,931 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 561 transitions. Word has length 94 [2022-11-03 02:38:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:17,932 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 561 transitions. [2022-11-03 02:38:17,932 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 02:38:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 561 transitions. [2022-11-03 02:38:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:38:17,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:17,934 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 02:38:17,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:18,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:18,159 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:18,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1937789153, now seen corresponding path program 1 times [2022-11-03 02:38:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:18,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272867137] [2022-11-03 02:38:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:18,161 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:18,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 02:38:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:19,135 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 02:38:19,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:19,561 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 02:38:19,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272867137] [2022-11-03 02:38:19,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272867137] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:38:19,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:38:19,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-03 02:38:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663826774] [2022-11-03 02:38:19,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:38:19,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:38:19,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:38:19,564 INFO L87 Difference]: Start difference. First operand 450 states and 561 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 02:38:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:20,245 INFO L93 Difference]: Finished difference Result 916 states and 1195 transitions. [2022-11-03 02:38:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:38:20,245 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 02:38:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:20,249 INFO L225 Difference]: With dead ends: 916 [2022-11-03 02:38:20,250 INFO L226 Difference]: Without dead ends: 676 [2022-11-03 02:38:20,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:38:20,251 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 613 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 696 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 02:38:20,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 696 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-03 02:38:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 450. [2022-11-03 02:38:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.2405345211581291) internal successors, (557), 449 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 557 transitions. [2022-11-03 02:38:20,301 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 557 transitions. Word has length 94 [2022-11-03 02:38:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:20,304 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 557 transitions. [2022-11-03 02:38:20,304 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 02:38:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 557 transitions. [2022-11-03 02:38:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:38:20,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:20,306 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 02:38:20,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 02:38:20,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,530 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1128442527, now seen corresponding path program 1 times [2022-11-03 02:38:20,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:20,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826430059] [2022-11-03 02:38:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:20,532 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:20,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 02:38:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:20,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:38:20,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:22,825 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 02:38:22,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:27,417 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 02:38:27,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826430059] [2022-11-03 02:38:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826430059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1486603753] [2022-11-03 02:38:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:27,418 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:27,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:27,419 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:27,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 02:38:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:28,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:38:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:32,477 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 02:38:32,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:37,298 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 02:38:37,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1486603753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108493518] [2022-11-03 02:38:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:37,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:37,303 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 02:38:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 02:38:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:39,511 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 02:38:39,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:40,604 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 02:38:40,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108493518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:40,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:40,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 21, 21] total 67 [2022-11-03 02:38:40,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143832615] [2022-11-03 02:38:40,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:40,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-03 02:38:40,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-03 02:38:40,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=4010, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 02:38:40,609 INFO L87 Difference]: Start difference. First operand 450 states and 557 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 02:38:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:54,138 INFO L93 Difference]: Finished difference Result 896 states and 1154 transitions. [2022-11-03 02:38:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:38:54,139 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 02:38:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:54,142 INFO L225 Difference]: With dead ends: 896 [2022-11-03 02:38:54,143 INFO L226 Difference]: Without dead ends: 894 [2022-11-03 02:38:54,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 500 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1730, Invalid=8982, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 02:38:54,145 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1232 mSDsluCounter, 7377 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 7719 SdHoareTripleChecker+Invalid, 5075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2497 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:54,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 7719 Invalid, 5075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2553 Invalid, 0 Unknown, 2497 Unchecked, 5.8s Time] [2022-11-03 02:38:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-03 02:38:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 448. [2022-11-03 02:38:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.2393736017897092) internal successors, (554), 447 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 554 transitions. [2022-11-03 02:38:54,195 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 554 transitions. Word has length 94 [2022-11-03 02:38:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:54,195 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 554 transitions. [2022-11-03 02:38:54,195 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 02:38:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 554 transitions. [2022-11-03 02:38:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:38:54,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:54,197 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 02:38:54,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:54,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 02:38:54,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:54,803 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1914387491, now seen corresponding path program 1 times [2022-11-03 02:38:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:54,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168093800] [2022-11-03 02:38:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:54,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:54,806 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:54,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:38:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:55,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:55,870 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 02:38:55,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:56,378 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 02:38:56,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168093800] [2022-11-03 02:38:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168093800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [577825593] [2022-11-03 02:38:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:56,380 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:56,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 02:38:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:57,574 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 02:38:57,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:58,018 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 02:38:58,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [577825593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:58,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421565103] [2022-11-03 02:38:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:58,020 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:58,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 02:38:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:38:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:58,704 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 02:38:58,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:59,113 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 02:38:59,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421565103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:59,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:59,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-03 02:38:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311702447] [2022-11-03 02:38:59,114 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:38:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:38:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:38:59,115 INFO L87 Difference]: Start difference. First operand 448 states and 554 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 02:38:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:59,488 INFO L93 Difference]: Finished difference Result 712 states and 904 transitions. [2022-11-03 02:38:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:38:59,489 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 02:38:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:59,490 INFO L225 Difference]: With dead ends: 712 [2022-11-03 02:38:59,490 INFO L226 Difference]: Without dead ends: 474 [2022-11-03 02:38:59,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 543 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:59,491 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 131 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:59,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1173 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-11-03 02:38:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-11-03 02:38:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 452. [2022-11-03 02:38:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.2328159645232817) internal successors, (556), 451 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 556 transitions. [2022-11-03 02:38:59,529 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 556 transitions. Word has length 94 [2022-11-03 02:38:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:59,529 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 556 transitions. [2022-11-03 02:38:59,530 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 02:38:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 556 transitions. [2022-11-03 02:38:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:38:59,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:59,532 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:38:59,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:59,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-03 02:39:00,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,142 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1450034033, now seen corresponding path program 1 times [2022-11-03 02:39:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315305077] [2022-11-03 02:39:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:00,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:00,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:00,145 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:00,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:39:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:39:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:02,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:04,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315305077] [2022-11-03 02:39:04,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315305077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223776396] [2022-11-03 02:39:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:04,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:04,360 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 02:39:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:39:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:07,665 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 02:39:07,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:09,407 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 02:39:09,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223776396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:09,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931300570] [2022-11-03 02:39:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:09,411 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:09,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-03 02:39:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:11,159 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 02:39:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:12,037 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 02:39:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931300570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:12,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:12,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 39 [2022-11-03 02:39:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795836515] [2022-11-03 02:39:12,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:39:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:39:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:39:12,039 INFO L87 Difference]: Start difference. First operand 452 states and 556 transitions. Second operand has 39 states, 39 states have (on average 18.58974358974359) internal successors, (725), 39 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:15,668 INFO L93 Difference]: Finished difference Result 904 states and 1159 transitions. [2022-11-03 02:39:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:39:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 18.58974358974359) internal successors, (725), 39 states have internal predecessors, (725), 0 states have call successors, (0), 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 02:39:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:15,670 INFO L225 Difference]: With dead ends: 904 [2022-11-03 02:39:15,670 INFO L226 Difference]: Without dead ends: 662 [2022-11-03 02:39:15,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 993 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=638, Invalid=4618, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 02:39:15,671 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 486 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:15,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 3257 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 194 Unchecked, 0.1s Time] [2022-11-03 02:39:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-03 02:39:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 646. [2022-11-03 02:39:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.262015503875969) internal successors, (814), 645 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 814 transitions. [2022-11-03 02:39:15,734 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 814 transitions. Word has length 171 [2022-11-03 02:39:15,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:15,735 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 814 transitions. [2022-11-03 02:39:15,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 18.58974358974359) internal successors, (725), 39 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 814 transitions. [2022-11-03 02:39:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:39:15,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:15,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:39:15,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:15,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 02:39:16,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:16,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:16,351 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1404873325, now seen corresponding path program 1 times [2022-11-03 02:39:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:16,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923271065] [2022-11-03 02:39:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:16,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:16,353 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:16,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 02:39:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:39:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 85 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:18,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 85 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:22,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:22,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923271065] [2022-11-03 02:39:22,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923271065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:22,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1431594697] [2022-11-03 02:39:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:22,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:22,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:22,136 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:22,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 02:39:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:39:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:25,314 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 02:39:25,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:26,796 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 02:39:26,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1431594697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:26,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317845821] [2022-11-03 02:39:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:26,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:26,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:26,797 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:26,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-03 02:39:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:39:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:28,398 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 02:39:28,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:29,181 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 02:39:29,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317845821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:29,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:29,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 6, 6] total 41 [2022-11-03 02:39:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692912512] [2022-11-03 02:39:29,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:39:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:39:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2022-11-03 02:39:29,184 INFO L87 Difference]: Start difference. First operand 646 states and 814 transitions. Second operand has 41 states, 41 states have (on average 17.75609756097561) internal successors, (728), 41 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:32,728 INFO L93 Difference]: Finished difference Result 1437 states and 1877 transitions. [2022-11-03 02:39:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:39:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 17.75609756097561) internal successors, (728), 41 states have internal predecessors, (728), 0 states have call successors, (0), 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 02:39:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:32,732 INFO L225 Difference]: With dead ends: 1437 [2022-11-03 02:39:32,732 INFO L226 Difference]: Without dead ends: 1019 [2022-11-03 02:39:32,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1073 GetRequests, 993 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=707, Invalid=4993, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:39:32,733 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 747 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:32,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 3419 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-03 02:39:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-11-03 02:39:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 952. [2022-11-03 02:39:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.2786540483701367) internal successors, (1216), 951 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1216 transitions. [2022-11-03 02:39:32,808 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1216 transitions. Word has length 171 [2022-11-03 02:39:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:32,808 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1216 transitions. [2022-11-03 02:39:32,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 17.75609756097561) internal successors, (728), 41 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1216 transitions. [2022-11-03 02:39:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:39:32,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:32,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:39:32,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:33,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-03 02:39:33,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-03 02:39:33,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:33,427 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1082178669, now seen corresponding path program 1 times [2022-11-03 02:39:33,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537029467] [2022-11-03 02:39:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:33,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:33,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:33,430 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:33,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 02:39:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:39:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 83 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:35,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 83 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:38,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537029467] [2022-11-03 02:39:38,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537029467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225511230] [2022-11-03 02:39:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:38,552 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:38,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-03 02:39:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:39,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:39:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:41,736 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 02:39:41,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:43,294 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 02:39:43,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225511230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028237369] [2022-11-03 02:39:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:43,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:43,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:43,296 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:43,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-03 02:39:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:39:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:45,891 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 02:39:45,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:46,842 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 02:39:46,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028237369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:46,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:39:46,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:39:46,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578705735] [2022-11-03 02:39:46,844 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:39:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:39:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:39:46,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:39:46,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:39:46,846 INFO L87 Difference]: Start difference. First operand 952 states and 1216 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 02:39:48,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:48,311 INFO L93 Difference]: Finished difference Result 2048 states and 2681 transitions. [2022-11-03 02:39:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:39:48,312 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 02:39:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:48,316 INFO L225 Difference]: With dead ends: 2048 [2022-11-03 02:39:48,316 INFO L226 Difference]: Without dead ends: 1324 [2022-11-03 02:39:48,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 990 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:39:48,318 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 323 mSDsluCounter, 2975 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:48,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 3118 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2022-11-03 02:39:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-03 02:39:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1208. [2022-11-03 02:39:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 1.283347141673571) internal successors, (1549), 1207 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:39:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1549 transitions. [2022-11-03 02:39:48,443 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1549 transitions. Word has length 171 [2022-11-03 02:39:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:48,443 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1549 transitions. [2022-11-03 02:39:48,443 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 02:39:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1549 transitions. [2022-11-03 02:39:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:39:48,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:48,447 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 02:39:48,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:48,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-03 02:39:48,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-03 02:39:49,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:39:49,060 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2049529323, now seen corresponding path program 1 times [2022-11-03 02:39:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:39:49,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540825004] [2022-11-03 02:39:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:49,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:39:49,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:39:49,062 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:39:49,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:39:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:39:49,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:50,850 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 02:39:50,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:54,269 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 02:39:54,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:39:54,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540825004] [2022-11-03 02:39:54,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540825004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1087921410] [2022-11-03 02:39:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:54,270 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:39:54,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:39:54,271 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:39:54,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 02:39:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:55,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:39:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:57,487 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 02:39:57,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:39:59,062 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 02:39:59,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1087921410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:39:59,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488711479] [2022-11-03 02:39:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:59,066 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:59,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 02:39:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:39:59,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:01,443 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 02:40:01,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:02,442 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 02:40:02,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488711479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:02,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:02,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:40:02,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825535785] [2022-11-03 02:40:02,443 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:02,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:40:02,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:02,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:40:02,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:40:02,446 INFO L87 Difference]: Start difference. First operand 1208 states and 1549 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 02:40:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:03,938 INFO L93 Difference]: Finished difference Result 2298 states and 3006 transitions. [2022-11-03 02:40:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:40:03,939 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 02:40:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:03,941 INFO L225 Difference]: With dead ends: 2298 [2022-11-03 02:40:03,941 INFO L226 Difference]: Without dead ends: 1324 [2022-11-03 02:40:03,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 990 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=319, Invalid=2231, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:40:03,943 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 400 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 3137 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:03,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 3137 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 92 Unchecked, 0.0s Time] [2022-11-03 02:40:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-03 02:40:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1212. [2022-11-03 02:40:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.283236994219653) internal successors, (1554), 1211 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1554 transitions. [2022-11-03 02:40:04,049 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1554 transitions. Word has length 171 [2022-11-03 02:40:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:04,049 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1554 transitions. [2022-11-03 02:40:04,050 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 02:40:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1554 transitions. [2022-11-03 02:40:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:40:04,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:04,051 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 02:40:04,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:04,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-03 02:40:04,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-03 02:40:04,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:04,664 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1752811799, now seen corresponding path program 1 times [2022-11-03 02:40:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:04,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818767305] [2022-11-03 02:40:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:04,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:04,667 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:04,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:40:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:06,492 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 02:40:06,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:09,756 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 02:40:09,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818767305] [2022-11-03 02:40:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818767305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599334840] [2022-11-03 02:40:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:09,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:09,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:09,757 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:09,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 02:40:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:40:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:12,967 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 02:40:12,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:14,520 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 02:40:14,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599334840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:14,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134737679] [2022-11-03 02:40:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:14,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:14,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:14,522 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:14,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-03 02:40:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:17,049 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 02:40:17,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:17,988 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 02:40:17,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134737679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:17,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:17,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:40:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272862993] [2022-11-03 02:40:17,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:40:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:40:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:40:17,990 INFO L87 Difference]: Start difference. First operand 1212 states and 1554 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 02:40:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:19,499 INFO L93 Difference]: Finished difference Result 2296 states and 3002 transitions. [2022-11-03 02:40:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:40:19,499 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 02:40:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:19,503 INFO L225 Difference]: With dead ends: 2296 [2022-11-03 02:40:19,503 INFO L226 Difference]: Without dead ends: 1324 [2022-11-03 02:40:19,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 990 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=332, Invalid=2320, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:40:19,508 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 454 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:19,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2966 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-11-03 02:40:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-03 02:40:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1224. [2022-11-03 02:40:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.2845461978740802) internal successors, (1571), 1223 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1571 transitions. [2022-11-03 02:40:19,590 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1571 transitions. Word has length 171 [2022-11-03 02:40:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:19,590 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1571 transitions. [2022-11-03 02:40:19,590 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 02:40:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1571 transitions. [2022-11-03 02:40:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:40:19,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:19,592 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 02:40:19,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:19,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:20,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-03 02:40:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:20,207 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1335415193, now seen corresponding path program 1 times [2022-11-03 02:40:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:20,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006815451] [2022-11-03 02:40:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:20,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:20,209 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:20,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-03 02:40:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:22,093 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 02:40:22,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:25,529 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 02:40:25,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:25,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006815451] [2022-11-03 02:40:25,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006815451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:25,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711608949] [2022-11-03 02:40:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:25,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:25,531 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:25,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-03 02:40:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:40:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:28,708 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 02:40:28,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:30,315 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 02:40:30,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711608949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394824309] [2022-11-03 02:40:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:30,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:30,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:30,317 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:30,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-03 02:40:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:32,742 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 02:40:32,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:33,651 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 02:40:33,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394824309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:33,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:33,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11, 11, 12, 11] total 36 [2022-11-03 02:40:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956886723] [2022-11-03 02:40:33,652 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:40:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:40:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 02:40:33,654 INFO L87 Difference]: Start difference. First operand 1224 states and 1571 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 02:40:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:35,413 INFO L93 Difference]: Finished difference Result 2326 states and 3044 transitions. [2022-11-03 02:40:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:40:35,414 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 02:40:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:35,419 INFO L225 Difference]: With dead ends: 2326 [2022-11-03 02:40:35,419 INFO L226 Difference]: Without dead ends: 1344 [2022-11-03 02:40:35,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 992 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=372, Invalid=2598, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 02:40:35,428 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 425 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:35,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 3079 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 223 Unchecked, 0.1s Time] [2022-11-03 02:40:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-11-03 02:40:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1228. [2022-11-03 02:40:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 1.2844335778321108) internal successors, (1576), 1227 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1576 transitions. [2022-11-03 02:40:35,513 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1576 transitions. Word has length 171 [2022-11-03 02:40:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:35,514 INFO L495 AbstractCegarLoop]: Abstraction has 1228 states and 1576 transitions. [2022-11-03 02:40:35,514 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 02:40:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1576 transitions. [2022-11-03 02:40:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:40:35,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:35,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:40:35,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-03 02:40:35,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-03 02:40:35,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-11-03 02:40:36,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:36,116 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -997977445, now seen corresponding path program 1 times [2022-11-03 02:40:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:36,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591763539] [2022-11-03 02:40:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:36,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:36,119 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:36,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-03 02:40:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:40:36,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:37,679 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 02:40:37,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:39,434 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 02:40:39,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:39,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591763539] [2022-11-03 02:40:39,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591763539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:39,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [616483092] [2022-11-03 02:40:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:39,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:39,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:39,436 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:39,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-03 02:40:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:40:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:42,495 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 02:40:42,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:43,946 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 02:40:43,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [616483092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:43,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341093573] [2022-11-03 02:40:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:43,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:43,948 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:43,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-03 02:40:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:44,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:44,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:46,347 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 02:40:46,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:47,229 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 02:40:47,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341093573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:47,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:40:47,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 11, 12, 11] total 35 [2022-11-03 02:40:47,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106081703] [2022-11-03 02:40:47,230 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:47,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:40:47,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:40:47,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:40:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:40:47,232 INFO L87 Difference]: Start difference. First operand 1228 states and 1576 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 02:40:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:48,902 INFO L93 Difference]: Finished difference Result 3502 states and 4558 transitions. [2022-11-03 02:40:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:40:48,903 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 02:40:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:48,909 INFO L225 Difference]: With dead ends: 3502 [2022-11-03 02:40:48,909 INFO L226 Difference]: Without dead ends: 2518 [2022-11-03 02:40:48,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 990 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=347, Invalid=2203, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:40:48,911 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 443 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:48,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 2824 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-11-03 02:40:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-11-03 02:40:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2368. [2022-11-03 02:40:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 1.2822137727080694) internal successors, (3035), 2367 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3035 transitions. [2022-11-03 02:40:49,152 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3035 transitions. Word has length 171 [2022-11-03 02:40:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:49,152 INFO L495 AbstractCegarLoop]: Abstraction has 2368 states and 3035 transitions. [2022-11-03 02:40:49,153 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 02:40:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3035 transitions. [2022-11-03 02:40:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:40:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:49,155 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 02:40:49,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:49,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:49,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-03 02:40:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:40:49,771 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash -437277667, now seen corresponding path program 1 times [2022-11-03 02:40:49,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:40:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36511823] [2022-11-03 02:40:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:49,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:40:49,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:40:49,774 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:40:49,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:40:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:51,587 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 02:40:51,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:54,182 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 02:40:54,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:40:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36511823] [2022-11-03 02:40:54,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36511823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:54,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836749548] [2022-11-03 02:40:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:54,183 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:40:54,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:40:54,188 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:40:54,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 02:40:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:40:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:57,349 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 02:40:57,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:58,984 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 02:40:58,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836749548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:58,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626560122] [2022-11-03 02:40:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:58,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:58,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:58,985 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:58,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 02:40:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:40:59,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:01,628 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 02:41:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:02,588 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 02:41:02,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626560122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:02,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:02,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 11, 12, 11] total 38 [2022-11-03 02:41:02,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837855641] [2022-11-03 02:41:02,589 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:02,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:41:02,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:41:02,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:41:02,592 INFO L87 Difference]: Start difference. First operand 2368 states and 3035 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 02:41:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:04,675 INFO L93 Difference]: Finished difference Result 5012 states and 6512 transitions. [2022-11-03 02:41:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:41:04,675 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 02:41:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:04,680 INFO L225 Difference]: With dead ends: 5012 [2022-11-03 02:41:04,680 INFO L226 Difference]: Without dead ends: 2946 [2022-11-03 02:41:04,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1050 GetRequests, 988 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=353, Invalid=2727, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 02:41:04,683 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 476 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:04,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 2614 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-11-03 02:41:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2022-11-03 02:41:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 2710. [2022-11-03 02:41:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 1.2820228866740495) internal successors, (3473), 2709 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 3473 transitions. [2022-11-03 02:41:04,916 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 3473 transitions. Word has length 171 [2022-11-03 02:41:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:04,916 INFO L495 AbstractCegarLoop]: Abstraction has 2710 states and 3473 transitions. [2022-11-03 02:41:04,916 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 02:41:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 3473 transitions. [2022-11-03 02:41:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:41:04,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:04,918 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 02:41:04,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-03 02:41:05,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 02:41:05,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:05,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:05,519 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 823639583, now seen corresponding path program 1 times [2022-11-03 02:41:05,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755980665] [2022-11-03 02:41:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:05,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:05,521 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:05,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 02:41:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:41:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:07,318 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 02:41:07,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:10,200 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 02:41:10,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:10,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755980665] [2022-11-03 02:41:10,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755980665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:10,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816068835] [2022-11-03 02:41:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:10,203 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:10,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 02:41:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:41:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:13,315 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 02:41:13,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:14,813 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 02:41:14,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816068835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:14,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630367763] [2022-11-03 02:41:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:14,814 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-03 02:41:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:41:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:17,071 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 02:41:17,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:18,030 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 02:41:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630367763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:18,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:18,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 11, 12, 11] total 34 [2022-11-03 02:41:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725882914] [2022-11-03 02:41:18,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 02:41:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 02:41:18,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:41:18,032 INFO L87 Difference]: Start difference. First operand 2710 states and 3473 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 02:41:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:19,321 INFO L93 Difference]: Finished difference Result 5600 states and 7271 transitions. [2022-11-03 02:41:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:41:19,321 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 02:41:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:19,324 INFO L225 Difference]: With dead ends: 5600 [2022-11-03 02:41:19,324 INFO L226 Difference]: Without dead ends: 3264 [2022-11-03 02:41:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 993 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:41:19,325 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 507 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:19,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 2926 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-11-03 02:41:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2022-11-03 02:41:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3052. [2022-11-03 02:41:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3051 states have (on average 1.282530317928548) internal successors, (3913), 3051 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 3913 transitions. [2022-11-03 02:41:19,514 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 3913 transitions. Word has length 171 [2022-11-03 02:41:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:19,514 INFO L495 AbstractCegarLoop]: Abstraction has 3052 states and 3913 transitions. [2022-11-03 02:41:19,514 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 02:41:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 3913 transitions. [2022-11-03 02:41:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:41:19,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:19,518 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 02:41:19,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:19,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-11-03 02:41:19,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-03 02:41:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:20,119 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1267540257, now seen corresponding path program 1 times [2022-11-03 02:41:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916809993] [2022-11-03 02:41:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:20,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:20,121 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:20,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-03 02:41:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:41:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:22,632 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 02:41:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:28,499 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 02:41:28,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916809993] [2022-11-03 02:41:28,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916809993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675344615] [2022-11-03 02:41:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:28,500 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:28,501 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:28,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-03 02:41:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:32,331 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 02:41:32,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:34,237 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 02:41:34,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675344615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295292264] [2022-11-03 02:41:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:34,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:34,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:34,238 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:34,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-03 02:41:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:41:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:37,057 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 02:41:37,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:38,025 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 02:41:38,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295292264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:38,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:38,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 11, 11, 12, 11] total 63 [2022-11-03 02:41:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423657951] [2022-11-03 02:41:38,026 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:38,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 02:41:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 02:41:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3671, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 02:41:38,028 INFO L87 Difference]: Start difference. First operand 3052 states and 3913 transitions. Second operand has 63 states, 63 states have (on average 9.365079365079366) internal successors, (590), 63 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 02:41:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:46,129 INFO L93 Difference]: Finished difference Result 5989 states and 7770 transitions. [2022-11-03 02:41:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-03 02:41:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 9.365079365079366) internal successors, (590), 63 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 02:41:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:46,133 INFO L225 Difference]: With dead ends: 5989 [2022-11-03 02:41:46,133 INFO L226 Difference]: Without dead ends: 3399 [2022-11-03 02:41:46,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 973 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=920, Invalid=12190, Unknown=0, NotChecked=0, Total=13110 [2022-11-03 02:41:46,135 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 732 mSDsluCounter, 5558 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 5726 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 813 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:46,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 5726 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 813 Unchecked, 0.0s Time] [2022-11-03 02:41:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2022-11-03 02:41:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3138. [2022-11-03 02:41:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 1.2824354478801403) internal successors, (4023), 3137 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4023 transitions. [2022-11-03 02:41:46,324 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4023 transitions. Word has length 171 [2022-11-03 02:41:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:46,324 INFO L495 AbstractCegarLoop]: Abstraction has 3138 states and 4023 transitions. [2022-11-03 02:41:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 9.365079365079366) internal successors, (590), 63 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 02:41:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4023 transitions. [2022-11-03 02:41:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:41:46,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:46,326 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 02:41:46,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-03 02:41:46,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-03 02:41:46,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:46,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:46,928 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -761045853, now seen corresponding path program 1 times [2022-11-03 02:41:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:46,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960111276] [2022-11-03 02:41:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:46,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:46,930 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:46,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-03 02:41:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:41:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:49,189 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 02:41:49,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:50,400 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 02:41:50,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:41:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960111276] [2022-11-03 02:41:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960111276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1293952293] [2022-11-03 02:41:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:50,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:41:50,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:41:50,401 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:41:50,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-03 02:41:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:51,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:41:51,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:52,916 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 02:41:52,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:53,822 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 02:41:53,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1293952293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152063067] [2022-11-03 02:41:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:53,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:53,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:53,823 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:53,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-03 02:41:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:41:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:56,165 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 02:41:56,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:57,048 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 02:41:57,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152063067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:57,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:41:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 11] total 24 [2022-11-03 02:41:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654015837] [2022-11-03 02:41:57,049 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:41:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:41:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:41:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:41:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:41:57,051 INFO L87 Difference]: Start difference. First operand 3138 states and 4023 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 02:41:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:57,652 INFO L93 Difference]: Finished difference Result 6346 states and 8229 transitions. [2022-11-03 02:41:57,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:41:57,653 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 02:41:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:57,657 INFO L225 Difference]: With dead ends: 6346 [2022-11-03 02:41:57,657 INFO L226 Difference]: Without dead ends: 3756 [2022-11-03 02:41:57,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 995 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:41:57,659 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 293 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:57,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2216 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 235 Unchecked, 0.1s Time] [2022-11-03 02:41:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2022-11-03 02:41:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 3106. [2022-11-03 02:41:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.281159420289855) internal successors, (3978), 3105 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 3978 transitions. [2022-11-03 02:41:57,892 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 3978 transitions. Word has length 171 [2022-11-03 02:41:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:57,892 INFO L495 AbstractCegarLoop]: Abstraction has 3106 states and 3978 transitions. [2022-11-03 02:41:57,892 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 02:41:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 3978 transitions. [2022-11-03 02:41:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:41:57,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:57,895 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 02:41:57,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-03 02:41:58,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-03 02:41:58,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:58,496 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:58,497 INFO L85 PathProgramCache]: Analyzing trace with hash 132440485, now seen corresponding path program 1 times [2022-11-03 02:41:58,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:41:58,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635343243] [2022-11-03 02:41:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:58,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:41:58,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:41:58,498 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:41:58,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:41:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 02:41:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:00,516 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 02:42:00,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:02,298 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 02:42:02,298 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:02,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635343243] [2022-11-03 02:42:02,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635343243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:02,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [954239074] [2022-11-03 02:42:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:02,298 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:02,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:02,299 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 02:42:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:42:02,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:03,295 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 02:42:03,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:03,701 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 02:42:03,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [954239074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:03,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932777183] [2022-11-03 02:42:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:03,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:03,702 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-03 02:42:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:42:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:04,353 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 02:42:04,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:04,664 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 02:42:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932777183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:04,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:04,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8, 8, 8, 8] total 26 [2022-11-03 02:42:04,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953056390] [2022-11-03 02:42:04,665 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:04,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:42:04,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:04,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:42:04,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:42:04,667 INFO L87 Difference]: Start difference. First operand 3106 states and 3978 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 02:42:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:09,998 INFO L93 Difference]: Finished difference Result 16688 states and 21807 transitions. [2022-11-03 02:42:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 02:42:09,999 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 02:42:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:10,017 INFO L225 Difference]: With dead ends: 16688 [2022-11-03 02:42:10,018 INFO L226 Difference]: Without dead ends: 14522 [2022-11-03 02:42:10,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1309, Invalid=5663, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 02:42:10,021 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 4661 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4661 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:10,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4661 Valid, 3157 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 600 Invalid, 0 Unknown, 385 Unchecked, 2.0s Time] [2022-11-03 02:42:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14522 states. [2022-11-03 02:42:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14522 to 4432. [2022-11-03 02:42:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 1.2832317761227714) internal successors, (5686), 4431 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 5686 transitions. [2022-11-03 02:42:10,565 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 5686 transitions. Word has length 171 [2022-11-03 02:42:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:10,565 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 5686 transitions. [2022-11-03 02:42:10,566 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 02:42:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 5686 transitions. [2022-11-03 02:42:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:10,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:10,568 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 02:42:10,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:10,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-03 02:42:11,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:11,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:11,169 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1722682267, now seen corresponding path program 1 times [2022-11-03 02:42:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:11,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995020889] [2022-11-03 02:42:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:11,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:11,171 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:11,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-03 02:42:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:42:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:12,945 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 02:42:12,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:14,489 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 02:42:14,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995020889] [2022-11-03 02:42:14,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995020889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1831728109] [2022-11-03 02:42:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:14,490 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:14,491 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:14,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-03 02:42:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:42:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:15,360 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 02:42:15,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:42:15,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1831728109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:42:15,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:42:15,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10] total 22 [2022-11-03 02:42:15,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432467533] [2022-11-03 02:42:15,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:15,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:42:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:42:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:42:15,362 INFO L87 Difference]: Start difference. First operand 4432 states and 5686 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 02:42:16,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:16,419 INFO L93 Difference]: Finished difference Result 11338 states and 14772 transitions. [2022-11-03 02:42:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:42:16,420 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 02:42:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:16,430 INFO L225 Difference]: With dead ends: 11338 [2022-11-03 02:42:16,431 INFO L226 Difference]: Without dead ends: 8896 [2022-11-03 02:42:16,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:42:16,435 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 948 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 848 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 02:42:16,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 848 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:42:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-11-03 02:42:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 4516. [2022-11-03 02:42:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 1.2779623477297897) internal successors, (5770), 4515 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:17,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 5770 transitions. [2022-11-03 02:42:17,124 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 5770 transitions. Word has length 171 [2022-11-03 02:42:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:17,124 INFO L495 AbstractCegarLoop]: Abstraction has 4516 states and 5770 transitions. [2022-11-03 02:42:17,124 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 02:42:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 5770 transitions. [2022-11-03 02:42:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:17,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:17,128 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 02:42:17,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (99)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:17,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-03 02:42:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:17,533 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1620570073, now seen corresponding path program 1 times [2022-11-03 02:42:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124256053] [2022-11-03 02:42:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:17,536 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:42:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:18,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:42:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:18,834 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 02:42:18,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:19,148 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 02:42:19,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124256053] [2022-11-03 02:42:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124256053] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:42:19,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:42:19,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-03 02:42:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39963328] [2022-11-03 02:42:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:42:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:42:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:42:19,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:42:19,152 INFO L87 Difference]: Start difference. First operand 4516 states and 5770 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 02:42:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:19,991 INFO L93 Difference]: Finished difference Result 12972 states and 16735 transitions. [2022-11-03 02:42:19,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:42:19,991 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 02:42:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:20,003 INFO L225 Difference]: With dead ends: 12972 [2022-11-03 02:42:20,003 INFO L226 Difference]: Without dead ends: 9012 [2022-11-03 02:42:20,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:42:20,008 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 479 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:20,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 442 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:42:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-11-03 02:42:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 4524. [2022-11-03 02:42:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4524 states, 4523 states have (on average 1.2761441521114305) internal successors, (5772), 4523 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4524 states to 4524 states and 5772 transitions. [2022-11-03 02:42:20,578 INFO L78 Accepts]: Start accepts. Automaton has 4524 states and 5772 transitions. Word has length 171 [2022-11-03 02:42:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:20,578 INFO L495 AbstractCegarLoop]: Abstraction has 4524 states and 5772 transitions. [2022-11-03 02:42:20,578 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 02:42:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4524 states and 5772 transitions. [2022-11-03 02:42:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:20,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:20,581 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 02:42:20,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 02:42:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:42:20,781 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1973658455, now seen corresponding path program 1 times [2022-11-03 02:42:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:20,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42373115] [2022-11-03 02:42:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:20,783 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:20,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-03 02:42:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:42:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:22,506 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 02:42:22,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:24,001 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 02:42:24,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42373115] [2022-11-03 02:42:24,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42373115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:24,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854985207] [2022-11-03 02:42:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:24,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:24,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:24,003 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:24,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-03 02:42:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:42:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:26,368 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 02:42:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:27,677 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 02:42:27,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854985207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:27,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696601984] [2022-11-03 02:42:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:27,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:27,679 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:27,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-03 02:42:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:28,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:28,932 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 02:42:28,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:29,506 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 02:42:29,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696601984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:29,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:29,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 28 [2022-11-03 02:42:29,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894611436] [2022-11-03 02:42:29,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:42:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:42:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:42:29,508 INFO L87 Difference]: Start difference. First operand 4524 states and 5772 transitions. Second operand has 28 states, 28 states have (on average 24.535714285714285) internal successors, (687), 28 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:31,075 INFO L93 Difference]: Finished difference Result 9108 states and 11727 transitions. [2022-11-03 02:42:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:42:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 24.535714285714285) internal successors, (687), 28 states have internal predecessors, (687), 0 states have call successors, (0), 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 02:42:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:31,081 INFO L225 Difference]: With dead ends: 9108 [2022-11-03 02:42:31,081 INFO L226 Difference]: Without dead ends: 5362 [2022-11-03 02:42:31,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 995 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:42:31,086 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 711 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:31,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1484 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-11-03 02:42:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2022-11-03 02:42:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 4944. [2022-11-03 02:42:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4943 states have (on average 1.2668419987861623) internal successors, (6262), 4943 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6262 transitions. [2022-11-03 02:42:31,659 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6262 transitions. Word has length 171 [2022-11-03 02:42:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:31,660 INFO L495 AbstractCegarLoop]: Abstraction has 4944 states and 6262 transitions. [2022-11-03 02:42:31,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.535714285714285) internal successors, (687), 28 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6262 transitions. [2022-11-03 02:42:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:31,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:31,664 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 02:42:31,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-03 02:42:31,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-03 02:42:32,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:32,265 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2046045013, now seen corresponding path program 1 times [2022-11-03 02:42:32,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044386291] [2022-11-03 02:42:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:32,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:32,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:32,267 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:32,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:42:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:42:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:34,284 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 02:42:34,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:35,858 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 02:42:35,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:35,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044386291] [2022-11-03 02:42:35,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044386291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:35,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518860469] [2022-11-03 02:42:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:35,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:35,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:35,860 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:35,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 02:42:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:42:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:38,214 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 02:42:38,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:39,550 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 02:42:39,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518860469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307922170] [2022-11-03 02:42:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:39,551 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:39,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 02:42:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:40,860 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 02:42:40,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:42,215 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 02:42:42,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307922170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:42,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:42,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:42:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413187556] [2022-11-03 02:42:42,217 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:42:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:42:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:42:42,219 INFO L87 Difference]: Start difference. First operand 4944 states and 6262 transitions. Second operand has 26 states, 26 states have (on average 20.5) internal successors, (533), 26 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:44,079 INFO L93 Difference]: Finished difference Result 10096 states and 12903 transitions. [2022-11-03 02:42:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:42:44,079 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 20.5) internal successors, (533), 26 states have internal predecessors, (533), 0 states have call successors, (0), 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 02:42:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:44,083 INFO L225 Difference]: With dead ends: 10096 [2022-11-03 02:42:44,083 INFO L226 Difference]: Without dead ends: 5996 [2022-11-03 02:42:44,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 997 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:42:44,085 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 734 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:44,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1382 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-11-03 02:42:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2022-11-03 02:42:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 4992. [2022-11-03 02:42:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4991 states have (on average 1.2544580244439991) internal successors, (6261), 4991 states have internal predecessors, (6261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 6261 transitions. [2022-11-03 02:42:44,476 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 6261 transitions. Word has length 171 [2022-11-03 02:42:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:44,477 INFO L495 AbstractCegarLoop]: Abstraction has 4992 states and 6261 transitions. [2022-11-03 02:42:44,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 20.5) internal successors, (533), 26 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 6261 transitions. [2022-11-03 02:42:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:44,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:44,480 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 02:42:44,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:44,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-03 02:42:44,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2022-11-03 02:42:45,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:45,081 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:45,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:45,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1344445139, now seen corresponding path program 1 times [2022-11-03 02:42:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176650127] [2022-11-03 02:42:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:45,084 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:45,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:42:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:42:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:47,246 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 02:42:47,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:48,889 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 02:42:48,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:42:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176650127] [2022-11-03 02:42:48,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176650127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610693736] [2022-11-03 02:42:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:42:48,891 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:42:48,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 02:42:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:42:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:51,292 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 02:42:51,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:52,636 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 02:42:52,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610693736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390721411] [2022-11-03 02:42:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:52,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:42:52,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:42:52,637 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:42:52,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 02:42:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:42:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:53,860 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 02:42:53,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:42:55,140 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 02:42:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390721411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:42:55,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:42:55,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:42:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526429139] [2022-11-03 02:42:55,141 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:42:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:42:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:42:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:42:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:42:55,142 INFO L87 Difference]: Start difference. First operand 4992 states and 6261 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 02:42:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:42:56,736 INFO L93 Difference]: Finished difference Result 10078 states and 12751 transitions. [2022-11-03 02:42:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:42:56,736 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 02:42:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:42:56,739 INFO L225 Difference]: With dead ends: 10078 [2022-11-03 02:42:56,740 INFO L226 Difference]: Without dead ends: 6060 [2022-11-03 02:42:56,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 997 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:42:56,742 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 675 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:42:56,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1427 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 235 Unchecked, 0.4s Time] [2022-11-03 02:42:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6060 states. [2022-11-03 02:42:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 4944. [2022-11-03 02:42:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4943 states have (on average 1.237305280194214) internal successors, (6116), 4943 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:42:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6116 transitions. [2022-11-03 02:42:57,129 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6116 transitions. Word has length 171 [2022-11-03 02:42:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:42:57,129 INFO L495 AbstractCegarLoop]: Abstraction has 4944 states and 6116 transitions. [2022-11-03 02:42:57,130 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 02:42:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6116 transitions. [2022-11-03 02:42:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:42:57,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:42:57,133 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 02:42:57,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-03 02:42:57,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-03 02:42:57,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-03 02:42:57,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:42:57,734 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:42:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:42:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1964986289, now seen corresponding path program 1 times [2022-11-03 02:42:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:42:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17543478] [2022-11-03 02:42:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:42:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:42:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:42:57,737 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:42:57,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 02:42:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:42:58,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:42:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:42:59,509 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 02:42:59,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:01,083 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 02:43:01,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17543478] [2022-11-03 02:43:01,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17543478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:01,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603400683] [2022-11-03 02:43:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:01,084 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:01,085 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 02:43:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:43:02,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:03,465 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 02:43:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:04,959 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 02:43:04,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603400683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:04,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454302395] [2022-11-03 02:43:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:04,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:04,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:04,960 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:04,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-03 02:43:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:43:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:06,237 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 02:43:06,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:06,806 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 02:43:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454302395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:06,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:06,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 28 [2022-11-03 02:43:06,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184128209] [2022-11-03 02:43:06,807 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:06,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:43:06,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:06,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:43:06,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:43:06,808 INFO L87 Difference]: Start difference. First operand 4944 states and 6116 transitions. Second operand has 28 states, 28 states have (on average 25.392857142857142) internal successors, (711), 28 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:43:09,269 INFO L93 Difference]: Finished difference Result 18466 states and 23187 transitions. [2022-11-03 02:43:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:43:09,270 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 25.392857142857142) internal successors, (711), 28 states have internal predecessors, (711), 0 states have call successors, (0), 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 02:43:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:43:09,278 INFO L225 Difference]: With dead ends: 18466 [2022-11-03 02:43:09,278 INFO L226 Difference]: Without dead ends: 13566 [2022-11-03 02:43:09,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 997 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2022-11-03 02:43:09,282 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 1738 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 3756 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:43:09,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1738 Valid, 3756 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 421 Invalid, 0 Unknown, 557 Unchecked, 0.8s Time] [2022-11-03 02:43:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13566 states. [2022-11-03 02:43:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13566 to 6548. [2022-11-03 02:43:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6548 states, 6547 states have (on average 1.2283488620742324) internal successors, (8042), 6547 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 8042 transitions. [2022-11-03 02:43:09,897 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 8042 transitions. Word has length 171 [2022-11-03 02:43:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:43:09,897 INFO L495 AbstractCegarLoop]: Abstraction has 6548 states and 8042 transitions. [2022-11-03 02:43:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 25.392857142857142) internal successors, (711), 28 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:43:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 8042 transitions. [2022-11-03 02:43:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:43:09,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:43:09,899 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 02:43:09,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-03 02:43:10,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:10,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Forceful destruction successful, exit code 0 [2022-11-03 02:43:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:10,501 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:43:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:43:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2105534899, now seen corresponding path program 1 times [2022-11-03 02:43:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:43:10,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432581864] [2022-11-03 02:43:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:43:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:43:10,503 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:43:10,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-03 02:43:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:43:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:14,257 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 02:43:14,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:21,811 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 02:43:21,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:43:21,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432581864] [2022-11-03 02:43:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432581864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091676907] [2022-11-03 02:43:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:43:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:43:21,813 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:43:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-03 02:43:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:23,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:43:23,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:30,603 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 02:43:30,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:38,057 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 02:43:38,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2091676907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817160764] [2022-11-03 02:43:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:43:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:43:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:43:38,059 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:43:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-03 02:43:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:43:38,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:43:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:43:41,706 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 02:43:41,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:43:43,413 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 02:43:43,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817160764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:43,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:43:43,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 85 [2022-11-03 02:43:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560572935] [2022-11-03 02:43:43,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-03 02:43:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:43:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-03 02:43:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=6708, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 02:43:43,417 INFO L87 Difference]: Start difference. First operand 6548 states and 8042 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 02:44:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:31,276 INFO L93 Difference]: Finished difference Result 33732 states and 41827 transitions. [2022-11-03 02:44:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-03 02:44:31,277 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 02:44:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:31,296 INFO L225 Difference]: With dead ends: 33732 [2022-11-03 02:44:31,297 INFO L226 Difference]: Without dead ends: 33730 [2022-11-03 02:44:31,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 937 SyntacticMatches, 4 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9387 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=6628, Invalid=32774, Unknown=0, NotChecked=0, Total=39402 [2022-11-03 02:44:31,304 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 4479 mSDsluCounter, 13852 mSDsCounter, 0 mSdLazyCounter, 3642 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 14160 SdHoareTripleChecker+Invalid, 11207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7400 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:31,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4479 Valid, 14160 Invalid, 11207 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [165 Valid, 3642 Invalid, 0 Unknown, 7400 Unchecked, 9.4s Time] [2022-11-03 02:44:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33730 states. [2022-11-03 02:44:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33730 to 7057. [2022-11-03 02:44:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7057 states, 7056 states have (on average 1.2322845804988662) internal successors, (8695), 7056 states have internal predecessors, (8695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7057 states to 7057 states and 8695 transitions. [2022-11-03 02:44:32,260 INFO L78 Accepts]: Start accepts. Automaton has 7057 states and 8695 transitions. Word has length 171 [2022-11-03 02:44:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 7057 states and 8695 transitions. [2022-11-03 02:44:32,261 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 02:44:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7057 states and 8695 transitions. [2022-11-03 02:44:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:44:32,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:32,264 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 02:44:32,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-03 02:44:32,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:32,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (114)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:32,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:32,865 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1931266959, now seen corresponding path program 1 times [2022-11-03 02:44:32,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:32,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58814524] [2022-11-03 02:44:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:32,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:32,867 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:32,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-03 02:44:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:33,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:34,212 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 02:44:34,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:34,384 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 02:44:34,384 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:34,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58814524] [2022-11-03 02:44:34,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58814524] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:34,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:44:34,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-03 02:44:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319276099] [2022-11-03 02:44:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:44:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:44:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:44:34,386 INFO L87 Difference]: Start difference. First operand 7057 states and 8695 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 02:44:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:35,541 INFO L93 Difference]: Finished difference Result 16766 states and 20888 transitions. [2022-11-03 02:44:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:44:35,542 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 02:44:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:35,548 INFO L225 Difference]: With dead ends: 16766 [2022-11-03 02:44:35,548 INFO L226 Difference]: Without dead ends: 11513 [2022-11-03 02:44:35,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:44:35,551 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 02:44:35,552 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 02:44:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11513 states. [2022-11-03 02:44:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11513 to 6953. [2022-11-03 02:44:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6953 states, 6952 states have (on average 1.215765247410817) internal successors, (8452), 6952 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6953 states to 6953 states and 8452 transitions. [2022-11-03 02:44:36,233 INFO L78 Accepts]: Start accepts. Automaton has 6953 states and 8452 transitions. Word has length 171 [2022-11-03 02:44:36,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:36,233 INFO L495 AbstractCegarLoop]: Abstraction has 6953 states and 8452 transitions. [2022-11-03 02:44:36,233 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 02:44:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 6953 states and 8452 transitions. [2022-11-03 02:44:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:44:36,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:36,237 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 02:44:36,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-03 02:44:36,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:36,450 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1094417649, now seen corresponding path program 1 times [2022-11-03 02:44:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299461599] [2022-11-03 02:44:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:36,452 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:36,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-03 02:44:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:44:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:37,938 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 02:44:37,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:38,385 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 02:44:38,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299461599] [2022-11-03 02:44:38,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299461599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [709141365] [2022-11-03 02:44:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:38,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:38,387 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:38,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-03 02:44:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:39,284 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 02:44:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:39,574 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 02:44:39,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [709141365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:39,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556676494] [2022-11-03 02:44:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:39,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:39,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:39,576 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:39,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-03 02:44:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:44:40,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:40,232 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 02:44:40,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:40,547 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 02:44:40,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556676494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:40,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:40,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8, 8, 8, 8] total 19 [2022-11-03 02:44:40,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307254775] [2022-11-03 02:44:40,548 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:40,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:44:40,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:44:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:44:40,550 INFO L87 Difference]: Start difference. First operand 6953 states and 8452 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 02:44:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:41,655 INFO L93 Difference]: Finished difference Result 15555 states and 19203 transitions. [2022-11-03 02:44:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:44:41,655 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 02:44:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:41,662 INFO L225 Difference]: With dead ends: 15555 [2022-11-03 02:44:41,662 INFO L226 Difference]: Without dead ends: 10486 [2022-11-03 02:44:41,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:44:41,667 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 227 mSDsluCounter, 1853 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:41,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2055 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-11-03 02:44:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2022-11-03 02:44:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 10160. [2022-11-03 02:44:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 1.225612757161138) internal successors, (12451), 10159 states have internal predecessors, (12451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 12451 transitions. [2022-11-03 02:44:42,494 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 12451 transitions. Word has length 171 [2022-11-03 02:44:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:42,494 INFO L495 AbstractCegarLoop]: Abstraction has 10160 states and 12451 transitions. [2022-11-03 02:44:42,494 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 02:44:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 12451 transitions. [2022-11-03 02:44:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:44:42,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:42,497 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 02:44:42,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-03 02:44:42,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2022-11-03 02:44:42,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-03 02:44:43,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:43,098 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash 606894641, now seen corresponding path program 1 times [2022-11-03 02:44:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:43,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251291856] [2022-11-03 02:44:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:43,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:43,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:43,100 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:43,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-03 02:44:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:44:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:44,869 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 02:44:44,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:46,336 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 02:44:46,336 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:44:46,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251291856] [2022-11-03 02:44:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251291856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:46,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074811948] [2022-11-03 02:44:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:46,336 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:44:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:44:46,338 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:44:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-11-03 02:44:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:44:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:48,671 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 02:44:48,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:49,874 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 02:44:49,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074811948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:49,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290932487] [2022-11-03 02:44:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:49,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:49,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:49,875 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:49,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-03 02:44:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:51,016 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 02:44:51,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:52,338 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 02:44:52,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290932487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:52,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:44:52,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 6, 6] total 26 [2022-11-03 02:44:52,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429799970] [2022-11-03 02:44:52,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:44:52,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:44:52,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:44:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:44:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:44:52,340 INFO L87 Difference]: Start difference. First operand 10160 states and 12451 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 02:44:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:55,583 INFO L93 Difference]: Finished difference Result 36188 states and 44625 transitions. [2022-11-03 02:44:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 02:44:55,584 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 02:44:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:55,660 INFO L225 Difference]: With dead ends: 36188 [2022-11-03 02:44:55,660 INFO L226 Difference]: Without dead ends: 33728 [2022-11-03 02:44:55,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 995 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:44:55,664 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1467 mSDsluCounter, 2808 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:55,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 3162 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 346 Invalid, 0 Unknown, 554 Unchecked, 0.8s Time] [2022-11-03 02:44:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33728 states. [2022-11-03 02:44:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33728 to 12672. [2022-11-03 02:44:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12672 states, 12671 states have (on average 1.2219240786046879) internal successors, (15483), 12671 states have internal predecessors, (15483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:44:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12672 states to 12672 states and 15483 transitions. [2022-11-03 02:44:56,682 INFO L78 Accepts]: Start accepts. Automaton has 12672 states and 15483 transitions. Word has length 171 [2022-11-03 02:44:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:56,682 INFO L495 AbstractCegarLoop]: Abstraction has 12672 states and 15483 transitions. [2022-11-03 02:44:56,683 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 02:44:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 12672 states and 15483 transitions. [2022-11-03 02:44:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:44:56,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:56,687 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 02:44:56,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2022-11-03 02:44:56,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-11-03 02:44:57,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-03 02:44:57,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:44:57,297 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:57,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1082049101, now seen corresponding path program 1 times [2022-11-03 02:44:57,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:44:57,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976258866] [2022-11-03 02:44:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:44:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:44:57,299 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:44:57,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-03 02:44:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:44:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:58,993 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 02:44:58,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:00,384 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 02:45:00,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976258866] [2022-11-03 02:45:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976258866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381716043] [2022-11-03 02:45:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:00,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:00,386 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-11-03 02:45:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:01,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:45:01,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:02,741 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 02:45:02,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:03,955 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 02:45:03,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1381716043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405944541] [2022-11-03 02:45:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:03,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:03,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:03,956 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:03,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-03 02:45:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:45:04,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:05,163 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 02:45:05,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:06,528 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 02:45:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405944541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:06,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:06,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 9, 6, 6] total 28 [2022-11-03 02:45:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594923026] [2022-11-03 02:45:06,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:45:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:45:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:45:06,530 INFO L87 Difference]: Start difference. First operand 12672 states and 15483 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 02:45:11,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:11,809 INFO L93 Difference]: Finished difference Result 48752 states and 60242 transitions. [2022-11-03 02:45:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:45:11,810 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 02:45:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:11,831 INFO L225 Difference]: With dead ends: 48752 [2022-11-03 02:45:11,831 INFO L226 Difference]: Without dead ends: 38664 [2022-11-03 02:45:11,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 998 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1006, Invalid=3686, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 02:45:11,838 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2582 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 3486 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 628 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:11,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 3486 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 635 Invalid, 0 Unknown, 628 Unchecked, 1.2s Time] [2022-11-03 02:45:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38664 states. [2022-11-03 02:45:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38664 to 18438. [2022-11-03 02:45:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18438 states, 18437 states have (on average 1.212561696588382) internal successors, (22356), 18437 states have internal predecessors, (22356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18438 states to 18438 states and 22356 transitions. [2022-11-03 02:45:13,610 INFO L78 Accepts]: Start accepts. Automaton has 18438 states and 22356 transitions. Word has length 171 [2022-11-03 02:45:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:13,610 INFO L495 AbstractCegarLoop]: Abstraction has 18438 states and 22356 transitions. [2022-11-03 02:45:13,610 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 02:45:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18438 states and 22356 transitions. [2022-11-03 02:45:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:45:13,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:13,618 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 02:45:13,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (124)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:13,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-11-03 02:45:14,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:45:14,219 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1624570293, now seen corresponding path program 1 times [2022-11-03 02:45:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:45:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945938854] [2022-11-03 02:45:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:14,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:45:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:45:14,221 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:45:14,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-03 02:45:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:14,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 02:45:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:17,335 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 02:45:17,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:26,498 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 02:45:26,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:45:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945938854] [2022-11-03 02:45:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945938854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023527950] [2022-11-03 02:45:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:26,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:45:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:45:26,500 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:45:26,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-03 02:45:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:28,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:45:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:34,958 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 02:45:34,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:44,798 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 02:45:44,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2023527950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010952351] [2022-11-03 02:45:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:44,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:44,800 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:44,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-03 02:45:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-03 02:45:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:47,558 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 02:45:47,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:49,451 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 02:45:49,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010952351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:49,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:45:49,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 93 [2022-11-03 02:45:49,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181539573] [2022-11-03 02:45:49,452 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:49,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-03 02:45:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:45:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-03 02:45:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=8080, Unknown=0, NotChecked=0, Total=8556 [2022-11-03 02:45:49,454 INFO L87 Difference]: Start difference. First operand 18438 states and 22356 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 02:47:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:11,175 INFO L93 Difference]: Finished difference Result 71467 states and 86699 transitions. [2022-11-03 02:47:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-03 02:47:11,176 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 02:47:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:11,219 INFO L225 Difference]: With dead ends: 71467 [2022-11-03 02:47:11,220 INFO L226 Difference]: Without dead ends: 71465 [2022-11-03 02:47:11,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1236 GetRequests, 938 SyntacticMatches, 19 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23964 ImplicationChecksByTransitivity, 84.0s TimeCoverageRelationStatistics Valid=11784, Invalid=66896, Unknown=0, NotChecked=0, Total=78680 [2022-11-03 02:47:11,231 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 3712 mSDsluCounter, 20910 mSDsCounter, 0 mSdLazyCounter, 6601 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3712 SdHoareTripleChecker+Valid, 21435 SdHoareTripleChecker+Invalid, 19049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 6601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12271 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:11,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3712 Valid, 21435 Invalid, 19049 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [177 Valid, 6601 Invalid, 0 Unknown, 12271 Unchecked, 14.9s Time] [2022-11-03 02:47:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71465 states. [2022-11-03 02:47:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71465 to 18456. [2022-11-03 02:47:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18456 states, 18455 states have (on average 1.2123543755079924) internal successors, (22374), 18455 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18456 states to 18456 states and 22374 transitions. [2022-11-03 02:47:13,073 INFO L78 Accepts]: Start accepts. Automaton has 18456 states and 22374 transitions. Word has length 171 [2022-11-03 02:47:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:13,074 INFO L495 AbstractCegarLoop]: Abstraction has 18456 states and 22374 transitions. [2022-11-03 02:47:13,074 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 02:47:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18456 states and 22374 transitions. [2022-11-03 02:47:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:47:13,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:13,078 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 02:47:13,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-03 02:47:13,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (127)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:13,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:47:13,679 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 422196657, now seen corresponding path program 2 times [2022-11-03 02:47:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:47:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626999105] [2022-11-03 02:47:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:13,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:47:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:47:13,682 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:47:13,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-03 02:47:14,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:14,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-03 02:47:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:17,087 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 02:47:17,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:24,575 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 02:47:24,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:47:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626999105] [2022-11-03 02:47:24,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626999105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1840968096] [2022-11-03 02:47:24,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:24,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:47:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:47:24,577 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:47:24,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Waiting until timeout for monitored process [2022-11-03 02:47:25,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:25,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:47:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:32,508 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 02:47:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:39,002 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 02:47:39,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1840968096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:39,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041364734] [2022-11-03 02:47:39,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:47:39,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:39,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:39,003 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-03 02:47:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:47:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:39,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:47:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:42,482 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 02:47:42,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:44,027 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 02:47:44,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041364734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:44,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:47:44,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 28, 28] total 88 [2022-11-03 02:47:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108851139] [2022-11-03 02:47:44,028 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:44,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-03 02:47:44,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:47:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-03 02:47:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=7188, Unknown=0, NotChecked=0, Total=7656 [2022-11-03 02:47:44,030 INFO L87 Difference]: Start difference. First operand 18456 states and 22374 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 02:48:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:25,130 INFO L93 Difference]: Finished difference Result 51982 states and 63025 transitions. [2022-11-03 02:48:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-03 02:48:25,131 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 02:48:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:25,160 INFO L225 Difference]: With dead ends: 51982 [2022-11-03 02:48:25,161 INFO L226 Difference]: Without dead ends: 51980 [2022-11-03 02:48:25,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1135 GetRequests, 947 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8545 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=5278, Invalid=29878, Unknown=0, NotChecked=0, Total=35156 [2022-11-03 02:48:25,167 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 3025 mSDsluCounter, 15299 mSDsCounter, 0 mSdLazyCounter, 5286 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3025 SdHoareTripleChecker+Valid, 15806 SdHoareTripleChecker+Invalid, 12844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 5286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7460 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:25,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3025 Valid, 15806 Invalid, 12844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 5286 Invalid, 0 Unknown, 7460 Unchecked, 11.3s Time] [2022-11-03 02:48:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51980 states. [2022-11-03 02:48:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51980 to 19248. [2022-11-03 02:48:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19248 states, 19247 states have (on average 1.212344781004832) internal successors, (23334), 19247 states have internal predecessors, (23334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19248 states to 19248 states and 23334 transitions. [2022-11-03 02:48:26,887 INFO L78 Accepts]: Start accepts. Automaton has 19248 states and 23334 transitions. Word has length 171 [2022-11-03 02:48:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:26,887 INFO L495 AbstractCegarLoop]: Abstraction has 19248 states and 23334 transitions. [2022-11-03 02:48:26,887 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 02:48:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 19248 states and 23334 transitions. [2022-11-03 02:48:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:48:26,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:26,893 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 02:48:26,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:27,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (130)] Ended with exit code 0 [2022-11-03 02:48:27,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-11-03 02:48:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:27,495 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash 479514541, now seen corresponding path program 1 times [2022-11-03 02:48:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:48:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334855356] [2022-11-03 02:48:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:27,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:48:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:48:27,497 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:48:27,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-03 02:48:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:48:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:30,473 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 02:48:30,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:35,697 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 02:48:35,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:48:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334855356] [2022-11-03 02:48:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334855356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118707516] [2022-11-03 02:48:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:48:35,698 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:48:35,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-03 02:48:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:48:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:38,489 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 02:48:38,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:39,606 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 02:48:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118707516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618434641] [2022-11-03 02:48:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:39,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:39,607 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:39,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b08bb8-b847-4904-b424-3f50fe3fa74c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-03 02:48:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:48:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:41,835 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 02:48:41,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:43,002 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 02:48:43,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618434641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:43,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:48:43,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24, 24, 25, 25] total 48 [2022-11-03 02:48:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749661741] [2022-11-03 02:48:43,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 02:48:43,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:48:43,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 02:48:43,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 02:48:43,004 INFO L87 Difference]: Start difference. First operand 19248 states and 23334 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)